[{"publication":"Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)","file":[{"relation":"main_file","content_type":"application/pdf","file_id":"29305","access_level":"open_access","file_name":"Template.pdf","file_size":236628,"creator":"ebbers","date_created":"2022-01-13T07:56:30Z","date_updated":"2022-01-13T08:19:19Z"}],"abstract":[{"lang":"eng","text":"In this work we address disentanglement of style and content in speech signals. We propose a fully convolutional variational autoencoder employing two encoders: a content encoder and a style encoder. To foster disentanglement, we propose adversarial contrastive predictive coding. This new disentanglement method does neither need parallel data nor any supervision. We show that the proposed technique is capable of separating speaker and content traits into the two different representations and show competitive speaker-content disentanglement performance compared to other unsupervised approaches. We further demonstrate an increased robustness of the content representation against a train-test mismatch compared to spectral features, when used for phone recognition."}],"language":[{"iso":"eng"}],"ddc":["000"],"quality_controlled":"1","year":"2021","date_created":"2022-01-13T07:55:29Z","title":"Contrastive Predictive Coding Supported Factorized Variational Autoencoder for Unsupervised Learning of Disentangled Speech Representations","type":"conference","status":"public","user_id":"34851","department":[{"_id":"54"}],"project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"29304","file_date_updated":"2022-01-13T08:19:19Z","has_accepted_license":"1","citation":{"apa":"Ebbers, J., Kuhlmann, M., Cord-Landwehr, T., &#38; Haeb-Umbach, R. (2021). Contrastive Predictive Coding Supported Factorized Variational Autoencoder for Unsupervised Learning of Disentangled Speech Representations. <i>Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)</i>, 3860–3864.","bibtex":"@inproceedings{Ebbers_Kuhlmann_Cord-Landwehr_Haeb-Umbach_2021, title={Contrastive Predictive Coding Supported Factorized Variational Autoencoder for Unsupervised Learning of Disentangled Speech Representations}, booktitle={Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, author={Ebbers, Janek and Kuhlmann, Michael and Cord-Landwehr, Tobias and Haeb-Umbach, Reinhold}, year={2021}, pages={3860–3864} }","short":"J. Ebbers, M. Kuhlmann, T. Cord-Landwehr, R. Haeb-Umbach, in: Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2021, pp. 3860–3864.","mla":"Ebbers, Janek, et al. “Contrastive Predictive Coding Supported Factorized Variational Autoencoder for Unsupervised Learning of Disentangled Speech Representations.” <i>Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)</i>, 2021, pp. 3860–3864.","ama":"Ebbers J, Kuhlmann M, Cord-Landwehr T, Haeb-Umbach R. Contrastive Predictive Coding Supported Factorized Variational Autoencoder for Unsupervised Learning of Disentangled Speech Representations. In: <i>Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)</i>. ; 2021:3860–3864.","ieee":"J. Ebbers, M. Kuhlmann, T. Cord-Landwehr, and R. Haeb-Umbach, “Contrastive Predictive Coding Supported Factorized Variational Autoencoder for Unsupervised Learning of Disentangled Speech Representations,” in <i>Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)</i>, 2021, pp. 3860–3864.","chicago":"Ebbers, Janek, Michael Kuhlmann, Tobias Cord-Landwehr, and Reinhold Haeb-Umbach. “Contrastive Predictive Coding Supported Factorized Variational Autoencoder for Unsupervised Learning of Disentangled Speech Representations.” In <i>Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)</i>, 3860–3864, 2021."},"page":"3860–3864","author":[{"first_name":"Janek","last_name":"Ebbers","id":"34851","full_name":"Ebbers, Janek"},{"first_name":"Michael","last_name":"Kuhlmann","full_name":"Kuhlmann, Michael","id":"49871"},{"first_name":"Tobias","id":"44393","full_name":"Cord-Landwehr, Tobias","last_name":"Cord-Landwehr"},{"first_name":"Reinhold","id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach"}],"date_updated":"2023-11-22T08:29:42Z","oa":"1"},{"type":"conference","status":"public","user_id":"49870","department":[{"_id":"54"}],"project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"26770","file_date_updated":"2021-12-06T10:48:30Z","related_material":{"link":[{"relation":"software","url":"https://github.com/fgnt/graph_pit"}]},"publication_status":"published","has_accepted_license":"1","citation":{"ama":"von Neumann T, Kinoshita K, Boeddeker C, Delcroix M, Haeb-Umbach R. Graph-PIT: Generalized Permutation Invariant Training for Continuous Separation of Arbitrary Numbers of Speakers. In: <i>Interspeech 2021</i>. ; 2021. doi:<a href=\"https://doi.org/10.21437/interspeech.2021-1177\">10.21437/interspeech.2021-1177</a>","ieee":"T. von Neumann, K. Kinoshita, C. Boeddeker, M. Delcroix, and R. Haeb-Umbach, “Graph-PIT: Generalized Permutation Invariant Training for Continuous Separation of Arbitrary Numbers of Speakers,” presented at the Interspeech, 2021, doi: <a href=\"https://doi.org/10.21437/interspeech.2021-1177\">10.21437/interspeech.2021-1177</a>.","chicago":"Neumann, Thilo von, Keisuke Kinoshita, Christoph Boeddeker, Marc Delcroix, and Reinhold Haeb-Umbach. “Graph-PIT: Generalized Permutation Invariant Training for Continuous Separation of Arbitrary Numbers of Speakers.” In <i>Interspeech 2021</i>, 2021. <a href=\"https://doi.org/10.21437/interspeech.2021-1177\">https://doi.org/10.21437/interspeech.2021-1177</a>.","apa":"von Neumann, T., Kinoshita, K., Boeddeker, C., Delcroix, M., &#38; Haeb-Umbach, R. (2021). Graph-PIT: Generalized Permutation Invariant Training for Continuous Separation of Arbitrary Numbers of Speakers. <i>Interspeech 2021</i>. Interspeech. <a href=\"https://doi.org/10.21437/interspeech.2021-1177\">https://doi.org/10.21437/interspeech.2021-1177</a>","short":"T. von Neumann, K. Kinoshita, C. Boeddeker, M. Delcroix, R. Haeb-Umbach, in: Interspeech 2021, 2021.","mla":"von Neumann, Thilo, et al. “Graph-PIT: Generalized Permutation Invariant Training for Continuous Separation of Arbitrary Numbers of Speakers.” <i>Interspeech 2021</i>, 2021, doi:<a href=\"https://doi.org/10.21437/interspeech.2021-1177\">10.21437/interspeech.2021-1177</a>.","bibtex":"@inproceedings{von Neumann_Kinoshita_Boeddeker_Delcroix_Haeb-Umbach_2021, title={Graph-PIT: Generalized Permutation Invariant Training for Continuous Separation of Arbitrary Numbers of Speakers}, DOI={<a href=\"https://doi.org/10.21437/interspeech.2021-1177\">10.21437/interspeech.2021-1177</a>}, booktitle={Interspeech 2021}, author={von Neumann, Thilo and Kinoshita, Keisuke and Boeddeker, Christoph and Delcroix, Marc and Haeb-Umbach, Reinhold}, year={2021} }"},"author":[{"full_name":"von Neumann, Thilo","id":"49870","orcid":"https://orcid.org/0000-0002-7717-8670","last_name":"von Neumann","first_name":"Thilo"},{"first_name":"Keisuke","last_name":"Kinoshita","full_name":"Kinoshita, Keisuke"},{"first_name":"Christoph","last_name":"Boeddeker","id":"40767","full_name":"Boeddeker, Christoph"},{"full_name":"Delcroix, Marc","last_name":"Delcroix","first_name":"Marc"},{"first_name":"Reinhold","id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach"}],"date_updated":"2023-11-15T12:14:40Z","oa":"1","doi":"10.21437/interspeech.2021-1177","conference":{"name":"Interspeech"},"publication":"Interspeech 2021","file":[{"date_updated":"2021-12-06T10:48:30Z","creator":"tvn","date_created":"2021-12-06T10:39:13Z","title":"Video for INTERSPEECH 2021","file_size":9550220,"access_level":"open_access","file_id":"28327","file_name":"Interspeech 2021 voiceover-002-compressed.mp4","content_type":"video/mp4","relation":"supplementary_material"},{"file_id":"28328","access_level":"open_access","file_name":"Graph-PIT-poster-presentation.pptx","file_size":1337297,"title":"Slides from INTERSPEECH 2021","date_created":"2021-12-06T10:47:01Z","creator":"tvn","date_updated":"2021-12-06T10:47:01Z","relation":"slides","content_type":"application/vnd.openxmlformats-officedocument.presentationml.presentation"},{"file_name":"INTERSPEECH2021_Graph_PIT.pdf","file_id":"28329","access_level":"open_access","file_size":226589,"creator":"tvn","date_created":"2021-12-06T10:48:21Z","date_updated":"2021-12-06T10:48:21Z","relation":"main_file","content_type":"application/pdf"}],"abstract":[{"text":"Automatic transcription of meetings requires handling of overlapped speech, which calls for continuous speech separation (CSS) systems. The uPIT criterion was proposed for utterance-level separation with neural networks and introduces the constraint that the total number of speakers must not exceed the number of output channels. When processing meeting-like data in a segment-wise manner, i.e., by separating overlapping segments independently and stitching adjacent segments to continuous output streams, this constraint has to be fulfilled for any segment. In this contribution, we show that this constraint can be significantly relaxed. We propose a novel graph-based PIT criterion, which casts the assignment of utterances to output channels in a graph coloring problem. It only requires that the number of concurrently active speakers must not exceed the number of output channels. As a consequence, the system can process an arbitrary number of speakers and arbitrarily long segments and thus can handle more diverse scenarios.\r\nFurther, the stitching algorithm for obtaining a consistent output order in neighboring segments is of less importance and can even be eliminated completely, not the least reducing the computational effort. Experiments on meeting-style WSJ data show improvements in recognition performance over using the uPIT criterion. ","lang":"eng"}],"language":[{"iso":"eng"}],"ddc":["000"],"keyword":["Continuous speech separation","automatic speech recognition","overlapped speech","permutation invariant training"],"quality_controlled":"1","year":"2021","date_created":"2021-10-25T08:50:01Z","title":"Graph-PIT: Generalized Permutation Invariant Training for Continuous Separation of Arbitrary Numbers of Speakers"},{"quality_controlled":"1","has_accepted_license":"1","citation":{"ama":"von Neumann T, Boeddeker C, Kinoshita K, Delcroix M, Haeb-Umbach R. Speeding Up Permutation Invariant Training for Source Separation. In: <i>Speech Communication; 14th ITG Conference</i>. ; 2021.","ieee":"T. von Neumann, C. Boeddeker, K. Kinoshita, M. Delcroix, and R. Haeb-Umbach, “Speeding Up Permutation Invariant Training for Source Separation,” presented at the Speech Communication; 14th ITG Conference, Kiel, 2021.","chicago":"Neumann, Thilo von, Christoph Boeddeker, Keisuke Kinoshita, Marc Delcroix, and Reinhold Haeb-Umbach. “Speeding Up Permutation Invariant Training for Source Separation.” In <i>Speech Communication; 14th ITG Conference</i>, 2021.","apa":"von Neumann, T., Boeddeker, C., Kinoshita, K., Delcroix, M., &#38; Haeb-Umbach, R. (2021). Speeding Up Permutation Invariant Training for Source Separation. <i>Speech Communication; 14th ITG Conference</i>. Speech Communication; 14th ITG Conference, Kiel.","short":"T. von Neumann, C. Boeddeker, K. Kinoshita, M. Delcroix, R. Haeb-Umbach, in: Speech Communication; 14th ITG Conference, 2021.","bibtex":"@inproceedings{von Neumann_Boeddeker_Kinoshita_Delcroix_Haeb-Umbach_2021, title={Speeding Up Permutation Invariant Training for Source Separation}, booktitle={Speech Communication; 14th ITG Conference}, author={von Neumann, Thilo and Boeddeker, Christoph and Kinoshita, Keisuke and Delcroix, Marc and Haeb-Umbach, Reinhold}, year={2021} }","mla":"von Neumann, Thilo, et al. “Speeding Up Permutation Invariant Training for Source Separation.” <i>Speech Communication; 14th ITG Conference</i>, 2021."},"year":"2021","date_created":"2022-01-07T10:40:56Z","author":[{"first_name":"Thilo","id":"49870","full_name":"von Neumann, Thilo","orcid":"https://orcid.org/0000-0002-7717-8670","last_name":"von Neumann"},{"id":"40767","full_name":"Boeddeker, Christoph","last_name":"Boeddeker","first_name":"Christoph"},{"last_name":"Kinoshita","full_name":"Kinoshita, Keisuke","first_name":"Keisuke"},{"last_name":"Delcroix","full_name":"Delcroix, Marc","first_name":"Marc"},{"first_name":"Reinhold","last_name":"Haeb-Umbach","full_name":"Haeb-Umbach, Reinhold","id":"242"}],"date_updated":"2023-11-15T12:16:31Z","oa":"1","conference":{"location":"Kiel","end_date":"2021-10-01","start_date":"2021-09-29","name":"Speech Communication; 14th ITG Conference"},"title":"Speeding Up Permutation Invariant Training for Source Separation","type":"conference","publication":"Speech Communication; 14th ITG Conference","file":[{"date_updated":"2022-01-06T13:23:27Z","date_created":"2022-01-06T13:23:27Z","creator":"tvn","file_size":191938,"access_level":"open_access","file_name":"poster.pdf","file_id":"29180","content_type":"application/pdf","relation":"poster"},{"content_type":"application/pdf","relation":"main_file","date_updated":"2022-01-07T10:42:54Z","date_created":"2022-01-07T10:42:54Z","creator":"tvn","file_size":236670,"access_level":"open_access","file_id":"29181","file_name":"ITG2021_Speeding_up_Permutation_Invariant_Training.pdf"}],"status":"public","user_id":"49870","department":[{"_id":"54"}],"project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"29173","language":[{"iso":"eng"}],"file_date_updated":"2022-01-07T10:42:54Z","ddc":["000"]},{"date_created":"2022-01-13T08:07:47Z","title":"Self-Trained Audio Tagging and Sound Event Detection in Domestic Environments","quality_controlled":"1","year":"2021","language":[{"iso":"eng"}],"ddc":["000"],"publication":"Proceedings of the 6th Detection and Classification of Acoustic Scenes and Events 2021 Workshop (DCASE2021)","file":[{"date_created":"2022-01-13T08:08:54Z","creator":"ebbers","date_updated":"2022-01-13T08:19:50Z","file_id":"29309","file_name":"template.pdf","access_level":"open_access","file_size":239462,"content_type":"application/pdf","relation":"main_file"}],"abstract":[{"text":"In this paper we present our system for the Detection and Classification of Acoustic Scenes and Events (DCASE) 2021 Challenge Task 4: Sound Event Detection and Separation in Domestic Environments, where it scored the fourth rank. Our presented solution is an advancement of our system used in the previous edition of the task.We use a forward-backward convolutional recurrent neural network (FBCRNN) for tagging and pseudo labeling followed by tag-conditioned sound event detection (SED) models which are trained using strong pseudo labels provided by the FBCRNN. Our advancement over our earlier model is threefold. First, we introduce a strong label loss in the objective of the FBCRNN to take advantage of the strongly labeled synthetic data during training. Second, we perform multiple iterations of self-training for both the FBCRNN and tag-conditioned SED models. Third, while we used only tag-conditioned CNNs as our SED model in the previous edition we here explore sophisticated tag-conditioned SED model architectures, namely, bidirectional CRNNs and bidirectional convolutional transformer neural networks (CTNNs), and combine them. With metric and class specific tuning of median filter lengths for post-processing, our final SED model, consisting of 6 submodels (2 of each architecture), achieves on the public evaluation set poly-phonic sound event detection scores (PSDS) of 0.455 for scenario 1 and 0.684 for scenario as well as a collar-based F1-score of 0.596 outperforming the baselines and our model from the previous edition by far. Source code is publicly available at https://github.com/fgnt/pb_sed.","lang":"eng"}],"author":[{"first_name":"Janek","full_name":"Ebbers, Janek","id":"34851","last_name":"Ebbers"},{"full_name":"Haeb-Umbach, Reinhold","id":"242","last_name":"Haeb-Umbach","first_name":"Reinhold"}],"date_updated":"2023-11-22T08:28:32Z","oa":"1","publication_identifier":{"isbn":["978-84-09-36072-7"]},"has_accepted_license":"1","page":"226–230","citation":{"chicago":"Ebbers, Janek, and Reinhold Haeb-Umbach. “Self-Trained Audio Tagging and Sound Event Detection in Domestic Environments.” In <i>Proceedings of the 6th Detection and Classification of Acoustic Scenes and Events 2021 Workshop (DCASE2021)</i>, 226–230. Barcelona, Spain, 2021.","ieee":"J. Ebbers and R. Haeb-Umbach, “Self-Trained Audio Tagging and Sound Event Detection in Domestic Environments,” in <i>Proceedings of the 6th Detection and Classification of Acoustic Scenes and Events 2021 Workshop (DCASE2021)</i>, 2021, pp. 226–230.","ama":"Ebbers J, Haeb-Umbach R. Self-Trained Audio Tagging and Sound Event Detection in Domestic Environments. In: <i>Proceedings of the 6th Detection and Classification of Acoustic Scenes and Events 2021 Workshop (DCASE2021)</i>. ; 2021:226–230.","short":"J. Ebbers, R. Haeb-Umbach, in: Proceedings of the 6th Detection and Classification of Acoustic Scenes and Events 2021 Workshop (DCASE2021), Barcelona, Spain, 2021, pp. 226–230.","mla":"Ebbers, Janek, and Reinhold Haeb-Umbach. “Self-Trained Audio Tagging and Sound Event Detection in Domestic Environments.” <i>Proceedings of the 6th Detection and Classification of Acoustic Scenes and Events 2021 Workshop (DCASE2021)</i>, 2021, pp. 226–230.","bibtex":"@inproceedings{Ebbers_Haeb-Umbach_2021, place={Barcelona, Spain}, title={Self-Trained Audio Tagging and Sound Event Detection in Domestic Environments}, booktitle={Proceedings of the 6th Detection and Classification of Acoustic Scenes and Events 2021 Workshop (DCASE2021)}, author={Ebbers, Janek and Haeb-Umbach, Reinhold}, year={2021}, pages={226–230} }","apa":"Ebbers, J., &#38; Haeb-Umbach, R. (2021). Self-Trained Audio Tagging and Sound Event Detection in Domestic Environments. <i>Proceedings of the 6th Detection and Classification of Acoustic Scenes and Events 2021 Workshop (DCASE2021)</i>, 226–230."},"place":"Barcelona, Spain","department":[{"_id":"54"}],"user_id":"34851","_id":"29308","project":[{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"file_date_updated":"2022-01-13T08:19:50Z","type":"conference","status":"public"},{"title":"Adapting Sound Recognition to A New Environment Via Self-Training","oa":"1","date_updated":"2023-11-22T08:28:50Z","date_created":"2022-01-13T08:01:21Z","author":[{"last_name":"Ebbers","id":"34851","full_name":"Ebbers, Janek","first_name":"Janek"},{"first_name":"Moritz Curt","last_name":"Keyser","full_name":"Keyser, Moritz Curt"},{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"}],"year":"2021","page":"1135–1139","citation":{"ama":"Ebbers J, Keyser MC, Haeb-Umbach R. Adapting Sound Recognition to A New Environment Via Self-Training. In: <i>Proceedings of the 29th European Signal Processing Conference (EUSIPCO)</i>. ; 2021:1135–1139.","ieee":"J. Ebbers, M. C. Keyser, and R. Haeb-Umbach, “Adapting Sound Recognition to A New Environment Via Self-Training,” in <i>Proceedings of the 29th European Signal Processing Conference (EUSIPCO)</i>, 2021, pp. 1135–1139.","chicago":"Ebbers, Janek, Moritz Curt Keyser, and Reinhold Haeb-Umbach. “Adapting Sound Recognition to A New Environment Via Self-Training.” In <i>Proceedings of the 29th European Signal Processing Conference (EUSIPCO)</i>, 1135–1139, 2021.","apa":"Ebbers, J., Keyser, M. C., &#38; Haeb-Umbach, R. (2021). Adapting Sound Recognition to A New Environment Via Self-Training. <i>Proceedings of the 29th European Signal Processing Conference (EUSIPCO)</i>, 1135–1139.","mla":"Ebbers, Janek, et al. “Adapting Sound Recognition to A New Environment Via Self-Training.” <i>Proceedings of the 29th European Signal Processing Conference (EUSIPCO)</i>, 2021, pp. 1135–1139.","short":"J. Ebbers, M.C. Keyser, R. Haeb-Umbach, in: Proceedings of the 29th European Signal Processing Conference (EUSIPCO), 2021, pp. 1135–1139.","bibtex":"@inproceedings{Ebbers_Keyser_Haeb-Umbach_2021, title={Adapting Sound Recognition to A New Environment Via Self-Training}, booktitle={Proceedings of the 29th European Signal Processing Conference (EUSIPCO)}, author={Ebbers, Janek and Keyser, Moritz Curt and Haeb-Umbach, Reinhold}, year={2021}, pages={1135–1139} }"},"has_accepted_license":"1","quality_controlled":"1","ddc":["000"],"language":[{"iso":"eng"}],"file_date_updated":"2022-01-13T08:19:35Z","_id":"29306","project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"54"}],"user_id":"34851","abstract":[{"lang":"eng","text":"Recently, there has been a rising interest in sound recognition via Acoustic Sensor Networks to support applications such as ambient assisted living or environmental habitat monitoring. With state-of-the-art sound recognition being dominated by deep-learning-based approaches, there is a high demand for labeled training data. Despite the availability of large-scale  data sets such as Google's AudioSet, acquiring training data matching a certain application environment is still often a problem. In this paper we are concerned with human activity monitoring in a domestic environment using an ASN consisting of multiple nodes each providing multichannel signals. We propose a self-training based domain adaptation approach, which only requires unlabeled data from the target environment. Here, a sound recognition system trained on AudioSet, the teacher, generates pseudo labels for data from the target environment on which a student network is trained. The student can furthermore glean information about the spatial arrangement of sensors and sound sources to further improve classification performance. It is shown that  the student significantly improves recognition performance over the pre-trained teacher without relying on labeled data from the environment the system is deployed in."}],"status":"public","file":[{"content_type":"application/pdf","relation":"main_file","date_created":"2022-01-13T08:03:26Z","creator":"ebbers","date_updated":"2022-01-13T08:19:35Z","access_level":"open_access","file_id":"29307","file_name":"conference_101719.pdf","file_size":213938}],"publication":"Proceedings of the 29th European Signal Processing Conference (EUSIPCO)","type":"conference"},{"date_created":"2023-01-03T10:05:13Z","author":[{"last_name":"Castells-Rufas","full_name":"Castells-Rufas, David","first_name":"David"},{"last_name":"Marco-Sola","full_name":"Marco-Sola, Santiago","first_name":"Santiago"},{"first_name":"Quim","last_name":"Aguado-Puig","full_name":"Aguado-Puig, Quim"},{"first_name":"Antonio","full_name":"Espinosa-Morales, Antonio","last_name":"Espinosa-Morales"},{"last_name":"Moure","full_name":"Moure, Juan Carlos","first_name":"Juan Carlos"},{"first_name":"Lluc","full_name":"Alvarez, Lluc","last_name":"Alvarez"},{"full_name":"Moreto, Miquel","last_name":"Moreto","first_name":"Miquel"}],"publisher":"IEEE","date_updated":"2024-01-22T09:56:25Z","doi":"10.1109/fpl53798.2021.00036","title":"OpenCL-based FPGA Accelerator for Semi-Global Approximate String Matching Using Diagonal Bit-Vectors","quality_controlled":"1","publication_status":"published","citation":{"chicago":"Castells-Rufas, David, Santiago Marco-Sola, Quim Aguado-Puig, Antonio Espinosa-Morales, Juan Carlos Moure, Lluc Alvarez, and Miquel Moreto. “OpenCL-Based FPGA Accelerator for Semi-Global Approximate String Matching Using Diagonal Bit-Vectors.” In <i>2021 31st International Conference on Field-Programmable Logic and Applications (FPL)</i>. IEEE, 2021. <a href=\"https://doi.org/10.1109/fpl53798.2021.00036\">https://doi.org/10.1109/fpl53798.2021.00036</a>.","ieee":"D. Castells-Rufas <i>et al.</i>, “OpenCL-based FPGA Accelerator for Semi-Global Approximate String Matching Using Diagonal Bit-Vectors,” 2021, doi: <a href=\"https://doi.org/10.1109/fpl53798.2021.00036\">10.1109/fpl53798.2021.00036</a>.","ama":"Castells-Rufas D, Marco-Sola S, Aguado-Puig Q, et al. OpenCL-based FPGA Accelerator for Semi-Global Approximate String Matching Using Diagonal Bit-Vectors. In: <i>2021 31st International Conference on Field-Programmable Logic and Applications (FPL)</i>. IEEE; 2021. doi:<a href=\"https://doi.org/10.1109/fpl53798.2021.00036\">10.1109/fpl53798.2021.00036</a>","apa":"Castells-Rufas, D., Marco-Sola, S., Aguado-Puig, Q., Espinosa-Morales, A., Moure, J. C., Alvarez, L., &#38; Moreto, M. (2021). OpenCL-based FPGA Accelerator for Semi-Global Approximate String Matching Using Diagonal Bit-Vectors. <i>2021 31st International Conference on Field-Programmable Logic and Applications (FPL)</i>. <a href=\"https://doi.org/10.1109/fpl53798.2021.00036\">https://doi.org/10.1109/fpl53798.2021.00036</a>","mla":"Castells-Rufas, David, et al. “OpenCL-Based FPGA Accelerator for Semi-Global Approximate String Matching Using Diagonal Bit-Vectors.” <i>2021 31st International Conference on Field-Programmable Logic and Applications (FPL)</i>, IEEE, 2021, doi:<a href=\"https://doi.org/10.1109/fpl53798.2021.00036\">10.1109/fpl53798.2021.00036</a>.","bibtex":"@inproceedings{Castells-Rufas_Marco-Sola_Aguado-Puig_Espinosa-Morales_Moure_Alvarez_Moreto_2021, title={OpenCL-based FPGA Accelerator for Semi-Global Approximate String Matching Using Diagonal Bit-Vectors}, DOI={<a href=\"https://doi.org/10.1109/fpl53798.2021.00036\">10.1109/fpl53798.2021.00036</a>}, booktitle={2021 31st International Conference on Field-Programmable Logic and Applications (FPL)}, publisher={IEEE}, author={Castells-Rufas, David and Marco-Sola, Santiago and Aguado-Puig, Quim and Espinosa-Morales, Antonio and Moure, Juan Carlos and Alvarez, Lluc and Moreto, Miquel}, year={2021} }","short":"D. Castells-Rufas, S. Marco-Sola, Q. Aguado-Puig, A. Espinosa-Morales, J.C. Moure, L. Alvarez, M. Moreto, in: 2021 31st International Conference on Field-Programmable Logic and Applications (FPL), IEEE, 2021."},"year":"2021","user_id":"3145","_id":"35131","project":[{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"language":[{"iso":"eng"}],"keyword":["pc2-harp-ressources"],"publication":"2021 31st International Conference on Field-Programmable Logic and Applications (FPL)","type":"conference","status":"public","abstract":[{"lang":"eng","text":"An FPGA accelerator for the computation of the semi-global Levenshtein distance between a pattern and a reference text is presented. The accelerator provides an important benefit to reduce the execution time of read-mappers used in short-read genomic sequencing. Previous attempts to solve the same problem in FPGA use the Myers algorithm following a column approach to compute the dynamic programming table. We use an approach based on diagonals that allows for some resource savings while maintaining a very high throughput of 1 alignment per clock cycle. The design is implemented in OpenCL and tested on two FPGA accelerators. The maximum performance obtained is 91.5 MPairs/s for 100 × 120 sequences and 47 MPairs/s for 300 × 360 sequences, the highest ever reported for this problem."}]},{"language":[{"iso":"eng"}],"user_id":"3145","department":[{"_id":"27"},{"_id":"518"}],"project":[{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"29937","status":"public","type":"conference","publication":"2021 IEEE International Parallel and Distributed Processing Symposium (IPDPS)","doi":"10.1109/ipdps49936.2021.00116","title":"High-Performance Spectral Element Methods on Field-Programmable Gate Arrays : Implementation, Evaluation, and Future Projection","author":[{"first_name":"Martin","full_name":"Karp, Martin","last_name":"Karp"},{"full_name":"Podobas, Artur","last_name":"Podobas","first_name":"Artur"},{"first_name":"Niclas","last_name":"Jansson","full_name":"Jansson, Niclas"},{"last_name":"Kenter","id":"3145","full_name":"Kenter, Tobias","first_name":"Tobias"},{"first_name":"Christian","id":"16153","full_name":"Plessl, Christian","last_name":"Plessl","orcid":"0000-0001-5728-9982"},{"full_name":"Schlatter, Philipp","last_name":"Schlatter","first_name":"Philipp"},{"full_name":"Markidis, Stefano","last_name":"Markidis","first_name":"Stefano"}],"date_created":"2022-02-21T14:26:37Z","date_updated":"2024-01-22T09:59:13Z","publisher":"IEEE","citation":{"apa":"Karp, M., Podobas, A., Jansson, N., Kenter, T., Plessl, C., Schlatter, P., &#38; Markidis, S. (2021). High-Performance Spectral Element Methods on Field-Programmable Gate Arrays : Implementation, Evaluation, and Future Projection. <i>2021 IEEE International Parallel and Distributed Processing Symposium (IPDPS)</i>. <a href=\"https://doi.org/10.1109/ipdps49936.2021.00116\">https://doi.org/10.1109/ipdps49936.2021.00116</a>","bibtex":"@inproceedings{Karp_Podobas_Jansson_Kenter_Plessl_Schlatter_Markidis_2021, title={High-Performance Spectral Element Methods on Field-Programmable Gate Arrays : Implementation, Evaluation, and Future Projection}, DOI={<a href=\"https://doi.org/10.1109/ipdps49936.2021.00116\">10.1109/ipdps49936.2021.00116</a>}, booktitle={2021 IEEE International Parallel and Distributed Processing Symposium (IPDPS)}, publisher={IEEE}, author={Karp, Martin and Podobas, Artur and Jansson, Niclas and Kenter, Tobias and Plessl, Christian and Schlatter, Philipp and Markidis, Stefano}, year={2021} }","mla":"Karp, Martin, et al. “High-Performance Spectral Element Methods on Field-Programmable Gate Arrays : Implementation, Evaluation, and Future Projection.” <i>2021 IEEE International Parallel and Distributed Processing Symposium (IPDPS)</i>, IEEE, 2021, doi:<a href=\"https://doi.org/10.1109/ipdps49936.2021.00116\">10.1109/ipdps49936.2021.00116</a>.","short":"M. Karp, A. Podobas, N. Jansson, T. Kenter, C. Plessl, P. Schlatter, S. Markidis, in: 2021 IEEE International Parallel and Distributed Processing Symposium (IPDPS), IEEE, 2021.","ama":"Karp M, Podobas A, Jansson N, et al. High-Performance Spectral Element Methods on Field-Programmable Gate Arrays : Implementation, Evaluation, and Future Projection. In: <i>2021 IEEE International Parallel and Distributed Processing Symposium (IPDPS)</i>. IEEE; 2021. doi:<a href=\"https://doi.org/10.1109/ipdps49936.2021.00116\">10.1109/ipdps49936.2021.00116</a>","ieee":"M. Karp <i>et al.</i>, “High-Performance Spectral Element Methods on Field-Programmable Gate Arrays : Implementation, Evaluation, and Future Projection,” 2021, doi: <a href=\"https://doi.org/10.1109/ipdps49936.2021.00116\">10.1109/ipdps49936.2021.00116</a>.","chicago":"Karp, Martin, Artur Podobas, Niclas Jansson, Tobias Kenter, Christian Plessl, Philipp Schlatter, and Stefano Markidis. “High-Performance Spectral Element Methods on Field-Programmable Gate Arrays : Implementation, Evaluation, and Future Projection.” In <i>2021 IEEE International Parallel and Distributed Processing Symposium (IPDPS)</i>. IEEE, 2021. <a href=\"https://doi.org/10.1109/ipdps49936.2021.00116\">https://doi.org/10.1109/ipdps49936.2021.00116</a>."},"year":"2021","publication_status":"published","quality_controlled":"1"},{"status":"public","type":"conference","publication":"Proceedings of the Platform for Advanced Scientific Computing Conference (PASC)","language":[{"iso":"eng"}],"user_id":"3145","department":[{"_id":"27"},{"_id":"518"}],"project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"46194","citation":{"apa":"Kenter, T., Shambhu, A., Faghih-Naini, S., &#38; Aizinger, V. (2021). Algorithm-hardware co-design of a discontinuous Galerkin shallow-water model for a dataflow architecture on FPGA. <i>Proceedings of the Platform for Advanced Scientific Computing Conference (PASC)</i>. <a href=\"https://doi.org/10.1145/3468267.3470617\">https://doi.org/10.1145/3468267.3470617</a>","bibtex":"@inproceedings{Kenter_Shambhu_Faghih-Naini_Aizinger_2021, title={Algorithm-hardware co-design of a discontinuous Galerkin shallow-water model for a dataflow architecture on FPGA}, DOI={<a href=\"https://doi.org/10.1145/3468267.3470617\">10.1145/3468267.3470617</a>}, booktitle={Proceedings of the Platform for Advanced Scientific Computing Conference (PASC)}, publisher={ACM}, author={Kenter, Tobias and Shambhu, Adesh and Faghih-Naini, Sara and Aizinger, Vadym}, year={2021} }","short":"T. Kenter, A. Shambhu, S. Faghih-Naini, V. Aizinger, in: Proceedings of the Platform for Advanced Scientific Computing Conference (PASC), ACM, 2021.","mla":"Kenter, Tobias, et al. “Algorithm-Hardware Co-Design of a Discontinuous Galerkin Shallow-Water Model for a Dataflow Architecture on FPGA.” <i>Proceedings of the Platform for Advanced Scientific Computing Conference (PASC)</i>, ACM, 2021, doi:<a href=\"https://doi.org/10.1145/3468267.3470617\">10.1145/3468267.3470617</a>.","chicago":"Kenter, Tobias, Adesh Shambhu, Sara Faghih-Naini, and Vadym Aizinger. “Algorithm-Hardware Co-Design of a Discontinuous Galerkin Shallow-Water Model for a Dataflow Architecture on FPGA.” In <i>Proceedings of the Platform for Advanced Scientific Computing Conference (PASC)</i>. ACM, 2021. <a href=\"https://doi.org/10.1145/3468267.3470617\">https://doi.org/10.1145/3468267.3470617</a>.","ieee":"T. Kenter, A. Shambhu, S. Faghih-Naini, and V. Aizinger, “Algorithm-hardware co-design of a discontinuous Galerkin shallow-water model for a dataflow architecture on FPGA,” 2021, doi: <a href=\"https://doi.org/10.1145/3468267.3470617\">10.1145/3468267.3470617</a>.","ama":"Kenter T, Shambhu A, Faghih-Naini S, Aizinger V. Algorithm-hardware co-design of a discontinuous Galerkin shallow-water model for a dataflow architecture on FPGA. In: <i>Proceedings of the Platform for Advanced Scientific Computing Conference (PASC)</i>. ACM; 2021. doi:<a href=\"https://doi.org/10.1145/3468267.3470617\">10.1145/3468267.3470617</a>"},"year":"2021","related_material":{"link":[{"description":"Open Access available via this link.","relation":"other","url":" https://www.sighpc.org/for-our-community/acm-open-tocs/pasc21-open-toc "}]},"publication_status":"published","quality_controlled":"1","main_file_link":[{"url":"https://dl.acm.org/doi/pdf/10.1145/3468267.3470617"}],"doi":"10.1145/3468267.3470617","title":"Algorithm-hardware co-design of a discontinuous Galerkin shallow-water model for a dataflow architecture on FPGA","date_created":"2023-07-28T11:58:14Z","author":[{"first_name":"Tobias","id":"3145","full_name":"Kenter, Tobias","last_name":"Kenter"},{"last_name":"Shambhu","full_name":"Shambhu, Adesh","first_name":"Adesh"},{"first_name":"Sara","full_name":"Faghih-Naini, Sara","last_name":"Faghih-Naini"},{"first_name":"Vadym","full_name":"Aizinger, Vadym","last_name":"Aizinger"}],"date_updated":"2024-04-17T08:12:21Z","publisher":"ACM"},{"type":"journal_article","status":"public","_id":"27099","project":[{"_id":"74","name":"TRR 142 - Subproject C4"},{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"_id":"60","name":"TRR 142 - Subproject A3"}],"department":[{"_id":"15"},{"_id":"230"},{"_id":"61"},{"_id":"51"}],"user_id":"158","file_date_updated":"2021-11-04T13:46:27Z","has_accepted_license":"1","publication_identifier":{"issn":["0003-6951","1077-3118"]},"publication_status":"published","page":"181109","intvolume":"       119","citation":{"ieee":"A. Widhalm <i>et al.</i>, “Optoelectronic sampling of ultrafast electric transients with single quantum dots,” <i>Applied Physics Letters</i>, vol. 119, p. 181109, 2021, doi: <a href=\"https://doi.org/10.1063/5.0061358\">10.1063/5.0061358</a>.","chicago":"Widhalm, Alex, Sebastian Krehs, Dustin Siebert, Nand Lal Sharma, Timo Langer, Björn Jonas, Dirk Reuter, Andreas Thiede, Jens Förstner, and Artur Zrenner. “Optoelectronic Sampling of Ultrafast Electric Transients with Single Quantum Dots.” <i>Applied Physics Letters</i> 119 (2021): 181109. <a href=\"https://doi.org/10.1063/5.0061358\">https://doi.org/10.1063/5.0061358</a>.","ama":"Widhalm A, Krehs S, Siebert D, et al. Optoelectronic sampling of ultrafast electric transients with single quantum dots. <i>Applied Physics Letters</i>. 2021;119:181109. doi:<a href=\"https://doi.org/10.1063/5.0061358\">10.1063/5.0061358</a>","apa":"Widhalm, A., Krehs, S., Siebert, D., Sharma, N. L., Langer, T., Jonas, B., Reuter, D., Thiede, A., Förstner, J., &#38; Zrenner, A. (2021). Optoelectronic sampling of ultrafast electric transients with single quantum dots. <i>Applied Physics Letters</i>, <i>119</i>, 181109. <a href=\"https://doi.org/10.1063/5.0061358\">https://doi.org/10.1063/5.0061358</a>","short":"A. Widhalm, S. Krehs, D. Siebert, N.L. Sharma, T. Langer, B. Jonas, D. Reuter, A. Thiede, J. Förstner, A. Zrenner, Applied Physics Letters 119 (2021) 181109.","bibtex":"@article{Widhalm_Krehs_Siebert_Sharma_Langer_Jonas_Reuter_Thiede_Förstner_Zrenner_2021, title={Optoelectronic sampling of ultrafast electric transients with single quantum dots}, volume={119}, DOI={<a href=\"https://doi.org/10.1063/5.0061358\">10.1063/5.0061358</a>}, journal={Applied Physics Letters}, author={Widhalm, Alex and Krehs, Sebastian and Siebert, Dustin and Sharma, Nand Lal and Langer, Timo and Jonas, Björn and Reuter, Dirk and Thiede, Andreas and Förstner, Jens and Zrenner, Artur}, year={2021}, pages={181109} }","mla":"Widhalm, Alex, et al. “Optoelectronic Sampling of Ultrafast Electric Transients with Single Quantum Dots.” <i>Applied Physics Letters</i>, vol. 119, 2021, p. 181109, doi:<a href=\"https://doi.org/10.1063/5.0061358\">10.1063/5.0061358</a>."},"date_updated":"2023-01-24T11:11:54Z","volume":119,"author":[{"first_name":"Alex","last_name":"Widhalm","full_name":"Widhalm, Alex"},{"last_name":"Krehs","full_name":"Krehs, Sebastian","first_name":"Sebastian"},{"last_name":"Siebert","full_name":"Siebert, Dustin","first_name":"Dustin"},{"first_name":"Nand Lal","last_name":"Sharma","full_name":"Sharma, Nand Lal"},{"first_name":"Timo","full_name":"Langer, Timo","last_name":"Langer"},{"full_name":"Jonas, Björn","last_name":"Jonas","first_name":"Björn"},{"last_name":"Reuter","full_name":"Reuter, Dirk","id":"37763","first_name":"Dirk"},{"first_name":"Andreas","full_name":"Thiede, Andreas","id":"538","last_name":"Thiede"},{"full_name":"Förstner, Jens","id":"158","orcid":"0000-0001-7059-9862","last_name":"Förstner","first_name":"Jens"},{"first_name":"Artur","id":"606","full_name":"Zrenner, Artur","orcid":"0000-0002-5190-0944","last_name":"Zrenner"}],"doi":"10.1063/5.0061358","publication":"Applied Physics Letters","abstract":[{"lang":"eng","text":"In our work, we have engineered low capacitance single quantum dot photodiodes as sensor devices for the optoelectronic sampling of ultrafast electric signals. By the Stark effect, a time-dependent electric signal is converted into a time-dependent shift of the transition energy. This shift is measured accurately by resonant ps laser spectroscopy with photocurrent detection. In our experiments, we sample the laser synchronous output pulse of an ultrafast CMOS circuit with high resolution. With our quantum dot sensor device, we were able to sample transients below 20 ps with a voltage resolution in the mV-range."}],"file":[{"embargo":"2022-11-04","access_level":"local","file_id":"27157","file_name":"2021-11 Widhalm - APL - Optoelectronic sampling of ultrafast electric transients with single quantum dots (published version).pdf","file_size":1999652,"date_created":"2021-11-04T13:46:27Z","creator":"fossie","date_updated":"2021-11-04T13:46:27Z","relation":"main_file","content_type":"application/pdf","embargo_to":"open_access"}],"keyword":["tet_topic_qd"],"ddc":["530"],"language":[{"iso":"eng"}],"year":"2021","date_created":"2021-11-03T10:32:03Z","title":"Optoelectronic sampling of ultrafast electric transients with single quantum dots"},{"title":"Steady states of $Λ$-type three-level systems excited by quantum  light in lossy cavities","date_updated":"2023-02-10T16:00:12Z","author":[{"first_name":"H.","full_name":"Rose, H.","last_name":"Rose"},{"last_name":"Tikhonova","full_name":"Tikhonova, O. V.","first_name":"O. V."},{"last_name":"Meier","full_name":"Meier, T.","first_name":"T."},{"last_name":"Sharapova","full_name":"Sharapova, P. ","first_name":"P. "}],"date_created":"2022-06-28T07:03:29Z","year":"2021","citation":{"bibtex":"@article{Rose_Tikhonova_Meier_Sharapova_2021, title={Steady states of $Λ$-type three-level systems excited by quantum  light in lossy cavities}, journal={arXiv:2109.00842}, author={Rose, H. and Tikhonova, O. V. and Meier, T. and Sharapova, P. }, year={2021} }","mla":"Rose, H., et al. “Steady States of $Λ$-Type Three-Level Systems Excited by Quantum  Light in Lossy Cavities.” <i>ArXiv:2109.00842</i>, 2021.","short":"H. Rose, O.V. Tikhonova, T. Meier, P. Sharapova, ArXiv:2109.00842 (2021).","apa":"Rose, H., Tikhonova, O. V., Meier, T., &#38; Sharapova, P. (2021). Steady states of $Λ$-type three-level systems excited by quantum  light in lossy cavities. In <i>arXiv:2109.00842</i>.","ama":"Rose H, Tikhonova OV, Meier T, Sharapova P. Steady states of $Λ$-type three-level systems excited by quantum  light in lossy cavities. <i>arXiv:210900842</i>. Published online 2021.","chicago":"Rose, H., O. V. Tikhonova, T. Meier, and P.  Sharapova. “Steady States of $Λ$-Type Three-Level Systems Excited by Quantum  Light in Lossy Cavities.” <i>ArXiv:2109.00842</i>, 2021.","ieee":"H. Rose, O. V. Tikhonova, T. Meier, and P. Sharapova, “Steady states of $Λ$-type three-level systems excited by quantum  light in lossy cavities,” <i>arXiv:2109.00842</i>. 2021."},"language":[{"iso":"eng"}],"project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"32236","external_id":{"arxiv":["2109.00842"]},"user_id":"14931","department":[{"_id":"27"}],"abstract":[{"lang":"eng","text":"The interaction between quantum light and matter is being intensively studied\r\nfor systems that are enclosed in high-$Q$ cavities which strongly enhance the\r\nlight-matter coupling. However, for many applications, cavities with lower\r\n$Q$-factors are preferred due to the increased spectral width of the cavity\r\nmode. Here, we investigate the interaction between quantum light and matter\r\nrepresented by a $\\Lambda$-type three-level system in lossy cavities, assuming\r\nthat cavity losses are the dominant loss mechanism. We demonstrate that cavity\r\nlosses lead to non-trivial steady states of the electronic occupations that can\r\nbe controlled by the loss rate and the initial statistics of the quantum\r\nfields. The mechanism of formation of such steady states can be understood on\r\nthe basis of the equations of motion. Analytical expressions for steady states\r\nand their numerical simulations are presented and discussed."}],"status":"public","type":"preprint","publication":"arXiv:2109.00842"},{"date_created":"2022-01-28T14:11:06Z","author":[{"first_name":"Wilhelm","last_name":"Kirchgässner","orcid":"0000-0001-9490-1843","full_name":"Kirchgässner, Wilhelm","id":"49265"},{"first_name":"Oliver","id":"11291","full_name":"Wallscheid, Oliver","last_name":"Wallscheid","orcid":"https://orcid.org/0000-0001-9362-8777"},{"orcid":"0000-0002-8480-7295","last_name":"Böcker","full_name":"Böcker, Joachim","id":"66","first_name":"Joachim"}],"date_updated":"2023-03-09T10:11:13Z","title":"Thermal Neural Networks: Lumped-Parameter Thermal Modeling With State-Space Machine Learning","citation":{"ieee":"W. Kirchgässner, O. Wallscheid, and J. Böcker, “Thermal Neural Networks: Lumped-Parameter Thermal Modeling With State-Space Machine Learning,” <i>arXiv preprint arXiv:2103.16323</i>. 2021.","chicago":"Kirchgässner, Wilhelm, Oliver Wallscheid, and Joachim Böcker. “Thermal Neural Networks: Lumped-Parameter Thermal Modeling With State-Space Machine Learning.” <i>ArXiv Preprint ArXiv:2103.16323</i>, 2021.","ama":"Kirchgässner W, Wallscheid O, Böcker J. Thermal Neural Networks: Lumped-Parameter Thermal Modeling With State-Space Machine Learning. <i>arXiv preprint arXiv:210316323</i>. Published online 2021.","apa":"Kirchgässner, W., Wallscheid, O., &#38; Böcker, J. (2021). Thermal Neural Networks: Lumped-Parameter Thermal Modeling With State-Space Machine Learning. In <i>arXiv preprint arXiv:2103.16323</i>.","bibtex":"@article{Kirchgässner_Wallscheid_Böcker_2021, title={Thermal Neural Networks: Lumped-Parameter Thermal Modeling With State-Space Machine Learning}, journal={arXiv preprint arXiv:2103.16323}, author={Kirchgässner, Wilhelm and Wallscheid, Oliver and Böcker, Joachim}, year={2021} }","mla":"Kirchgässner, Wilhelm, et al. “Thermal Neural Networks: Lumped-Parameter Thermal Modeling With State-Space Machine Learning.” <i>ArXiv Preprint ArXiv:2103.16323</i>, 2021.","short":"W. Kirchgässner, O. Wallscheid, J. Böcker, ArXiv Preprint ArXiv:2103.16323 (2021)."},"year":"2021","user_id":"49265","department":[{"_id":"52"}],"project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"29655","language":[{"iso":"eng"}],"type":"preprint","publication":"arXiv preprint arXiv:2103.16323","status":"public"},{"citation":{"chicago":"Lüders, Carolin, Matthias Pukrop, Elena Rozas, Christian Schneider, Sven Höfling, Jan Sperling, Stefan Schumacher, and Marc Aßmann. “Quantifying Quantum Coherence in Polariton Condensates.” <i>PRX Quantum</i>, 2021. <a href=\"https://doi.org/10.1103/prxquantum.2.030320\">https://doi.org/10.1103/prxquantum.2.030320</a>.","ieee":"C. Lüders <i>et al.</i>, “Quantifying Quantum Coherence in Polariton Condensates,” <i>PRX Quantum</i>, 2021, doi: <a href=\"https://doi.org/10.1103/prxquantum.2.030320\">10.1103/prxquantum.2.030320</a>.","ama":"Lüders C, Pukrop M, Rozas E, et al. Quantifying Quantum Coherence in Polariton Condensates. <i>PRX Quantum</i>. Published online 2021. doi:<a href=\"https://doi.org/10.1103/prxquantum.2.030320\">10.1103/prxquantum.2.030320</a>","bibtex":"@article{Lüders_Pukrop_Rozas_Schneider_Höfling_Sperling_Schumacher_Aßmann_2021, title={Quantifying Quantum Coherence in Polariton Condensates}, DOI={<a href=\"https://doi.org/10.1103/prxquantum.2.030320\">10.1103/prxquantum.2.030320</a>}, journal={PRX Quantum}, author={Lüders, Carolin and Pukrop, Matthias and Rozas, Elena and Schneider, Christian and Höfling, Sven and Sperling, Jan and Schumacher, Stefan and Aßmann, Marc}, year={2021} }","short":"C. Lüders, M. Pukrop, E. Rozas, C. Schneider, S. Höfling, J. Sperling, S. Schumacher, M. Aßmann, PRX Quantum (2021).","mla":"Lüders, Carolin, et al. “Quantifying Quantum Coherence in Polariton Condensates.” <i>PRX Quantum</i>, 2021, doi:<a href=\"https://doi.org/10.1103/prxquantum.2.030320\">10.1103/prxquantum.2.030320</a>.","apa":"Lüders, C., Pukrop, M., Rozas, E., Schneider, C., Höfling, S., Sperling, J., Schumacher, S., &#38; Aßmann, M. (2021). Quantifying Quantum Coherence in Polariton Condensates. <i>PRX Quantum</i>. <a href=\"https://doi.org/10.1103/prxquantum.2.030320\">https://doi.org/10.1103/prxquantum.2.030320</a>"},"year":"2021","publication_identifier":{"issn":["2691-3399"]},"publication_status":"published","doi":"10.1103/prxquantum.2.030320","title":"Quantifying Quantum Coherence in Polariton Condensates","date_created":"2021-10-15T16:00:39Z","author":[{"full_name":"Lüders, Carolin","last_name":"Lüders","first_name":"Carolin"},{"last_name":"Pukrop","full_name":"Pukrop, Matthias","id":"64535","first_name":"Matthias"},{"full_name":"Rozas, Elena","last_name":"Rozas","first_name":"Elena"},{"last_name":"Schneider","full_name":"Schneider, Christian","first_name":"Christian"},{"first_name":"Sven","last_name":"Höfling","full_name":"Höfling, Sven"},{"orcid":"0000-0002-5844-3205","last_name":"Sperling","full_name":"Sperling, Jan","id":"75127","first_name":"Jan"},{"last_name":"Schumacher","orcid":"0000-0003-4042-4951","full_name":"Schumacher, Stefan","id":"27271","first_name":"Stefan"},{"last_name":"Aßmann","full_name":"Aßmann, Marc","first_name":"Marc"}],"date_updated":"2023-04-20T15:11:36Z","status":"public","publication":"PRX Quantum","type":"journal_article","language":[{"iso":"eng"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"706"},{"_id":"230"},{"_id":"429"},{"_id":"623"},{"_id":"35"}],"user_id":"16199","_id":"26283","project":[{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"_id":"53","name":"TRR 142: TRR 142"},{"_id":"54","name":"TRR 142 - A: TRR 142 - Project Area A"},{"_id":"61","name":"TRR 142 - A4: TRR 142 - Subproject A4"}]},{"user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"35"},{"_id":"790"}],"project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"_id":"53","name":"TRR 142: TRR 142"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"name":"TRR 142 - B4: TRR 142 - Subproject B4","_id":"69"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"29748","language":[{"iso":"eng"}],"keyword":["Surfaces","Coatings and Films","Physical and Theoretical Chemistry","General Energy","Electronic","Optical and Magnetic Materials"],"type":"journal_article","publication":"The Journal of Physical Chemistry C","status":"public","date_created":"2022-02-03T15:37:32Z","author":[{"first_name":"Diana","last_name":"Slawig","full_name":"Slawig, Diana"},{"first_name":"Markus","last_name":"Gruschwitz","full_name":"Gruschwitz, Markus"},{"first_name":"Uwe","full_name":"Gerstmann, Uwe","id":"171","orcid":"0000-0002-4476-223X","last_name":"Gerstmann"},{"first_name":"Eva","last_name":"Rauls","full_name":"Rauls, Eva"},{"first_name":"Christoph","full_name":"Tegenkamp, Christoph","last_name":"Tegenkamp"}],"volume":125,"publisher":"American Chemical Society (ACS)","date_updated":"2023-04-20T16:04:22Z","doi":"10.1021/acs.jpcc.1c06320","title":"Adsorption and Reaction of PbPc on Hydrogenated Epitaxial Graphene","issue":"36","publication_status":"published","publication_identifier":{"issn":["1932-7447","1932-7455"]},"citation":{"ama":"Slawig D, Gruschwitz M, Gerstmann U, Rauls E, Tegenkamp C. Adsorption and Reaction of PbPc on Hydrogenated Epitaxial Graphene. <i>The Journal of Physical Chemistry C</i>. 2021;125(36):20087-20093. doi:<a href=\"https://doi.org/10.1021/acs.jpcc.1c06320\">10.1021/acs.jpcc.1c06320</a>","chicago":"Slawig, Diana, Markus Gruschwitz, Uwe Gerstmann, Eva Rauls, and Christoph Tegenkamp. “Adsorption and Reaction of PbPc on Hydrogenated Epitaxial Graphene.” <i>The Journal of Physical Chemistry C</i> 125, no. 36 (2021): 20087–93. <a href=\"https://doi.org/10.1021/acs.jpcc.1c06320\">https://doi.org/10.1021/acs.jpcc.1c06320</a>.","ieee":"D. Slawig, M. Gruschwitz, U. Gerstmann, E. Rauls, and C. Tegenkamp, “Adsorption and Reaction of PbPc on Hydrogenated Epitaxial Graphene,” <i>The Journal of Physical Chemistry C</i>, vol. 125, no. 36, pp. 20087–20093, 2021, doi: <a href=\"https://doi.org/10.1021/acs.jpcc.1c06320\">10.1021/acs.jpcc.1c06320</a>.","short":"D. Slawig, M. Gruschwitz, U. Gerstmann, E. Rauls, C. Tegenkamp, The Journal of Physical Chemistry C 125 (2021) 20087–20093.","mla":"Slawig, Diana, et al. “Adsorption and Reaction of PbPc on Hydrogenated Epitaxial Graphene.” <i>The Journal of Physical Chemistry C</i>, vol. 125, no. 36, American Chemical Society (ACS), 2021, pp. 20087–93, doi:<a href=\"https://doi.org/10.1021/acs.jpcc.1c06320\">10.1021/acs.jpcc.1c06320</a>.","bibtex":"@article{Slawig_Gruschwitz_Gerstmann_Rauls_Tegenkamp_2021, title={Adsorption and Reaction of PbPc on Hydrogenated Epitaxial Graphene}, volume={125}, DOI={<a href=\"https://doi.org/10.1021/acs.jpcc.1c06320\">10.1021/acs.jpcc.1c06320</a>}, number={36}, journal={The Journal of Physical Chemistry C}, publisher={American Chemical Society (ACS)}, author={Slawig, Diana and Gruschwitz, Markus and Gerstmann, Uwe and Rauls, Eva and Tegenkamp, Christoph}, year={2021}, pages={20087–20093} }","apa":"Slawig, D., Gruschwitz, M., Gerstmann, U., Rauls, E., &#38; Tegenkamp, C. (2021). Adsorption and Reaction of PbPc on Hydrogenated Epitaxial Graphene. <i>The Journal of Physical Chemistry C</i>, <i>125</i>(36), 20087–20093. <a href=\"https://doi.org/10.1021/acs.jpcc.1c06320\">https://doi.org/10.1021/acs.jpcc.1c06320</a>"},"page":"20087-20093","intvolume":"       125","year":"2021"},{"title":"Neighboring Atom Collisions in Solid-State High Harmonic Generation","doi":"10.34133/2021/9861923","publisher":"American Association for the Advancement of Science (AAAS)","date_updated":"2023-04-21T11:11:08Z","volume":2021,"author":[{"first_name":"Ruixin","full_name":"Zuo, Ruixin","last_name":"Zuo"},{"last_name":"Trautmann","full_name":"Trautmann, Alexander","id":"38163","first_name":"Alexander"},{"full_name":"Wang, Guifang","last_name":"Wang","first_name":"Guifang"},{"last_name":"Hannes","full_name":"Hannes, Wolf-Rüdiger","first_name":"Wolf-Rüdiger"},{"full_name":"Yang, Shidong","last_name":"Yang","first_name":"Shidong"},{"first_name":"Xiaohong","full_name":"Song, Xiaohong","last_name":"Song"},{"last_name":"Meier","orcid":"0000-0001-8864-2072","full_name":"Meier, Torsten","id":"344","first_name":"Torsten"},{"first_name":"Marcelo","last_name":"Ciappina","full_name":"Ciappina, Marcelo"},{"first_name":"Huynh Thanh","last_name":"Duc","full_name":"Duc, Huynh Thanh"},{"last_name":"Yang","full_name":"Yang, Weifeng","first_name":"Weifeng"}],"date_created":"2023-01-18T11:25:42Z","year":"2021","intvolume":"      2021","citation":{"ieee":"R. Zuo <i>et al.</i>, “Neighboring Atom Collisions in Solid-State High Harmonic Generation,” <i>Ultrafast Science</i>, vol. 2021, 2021, doi: <a href=\"https://doi.org/10.34133/2021/9861923\">10.34133/2021/9861923</a>.","chicago":"Zuo, Ruixin, Alexander Trautmann, Guifang Wang, Wolf-Rüdiger Hannes, Shidong Yang, Xiaohong Song, Torsten Meier, Marcelo Ciappina, Huynh Thanh Duc, and Weifeng Yang. “Neighboring Atom Collisions in Solid-State High Harmonic Generation.” <i>Ultrafast Science</i> 2021 (2021). <a href=\"https://doi.org/10.34133/2021/9861923\">https://doi.org/10.34133/2021/9861923</a>.","ama":"Zuo R, Trautmann A, Wang G, et al. Neighboring Atom Collisions in Solid-State High Harmonic Generation. <i>Ultrafast Science</i>. 2021;2021. doi:<a href=\"https://doi.org/10.34133/2021/9861923\">10.34133/2021/9861923</a>","bibtex":"@article{Zuo_Trautmann_Wang_Hannes_Yang_Song_Meier_Ciappina_Duc_Yang_2021, title={Neighboring Atom Collisions in Solid-State High Harmonic Generation}, volume={2021}, DOI={<a href=\"https://doi.org/10.34133/2021/9861923\">10.34133/2021/9861923</a>}, journal={Ultrafast Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Zuo, Ruixin and Trautmann, Alexander and Wang, Guifang and Hannes, Wolf-Rüdiger and Yang, Shidong and Song, Xiaohong and Meier, Torsten and Ciappina, Marcelo and Duc, Huynh Thanh and Yang, Weifeng}, year={2021} }","short":"R. Zuo, A. Trautmann, G. Wang, W.-R. Hannes, S. Yang, X. Song, T. Meier, M. Ciappina, H.T. Duc, W. Yang, Ultrafast Science 2021 (2021).","mla":"Zuo, Ruixin, et al. “Neighboring Atom Collisions in Solid-State High Harmonic Generation.” <i>Ultrafast Science</i>, vol. 2021, American Association for the Advancement of Science (AAAS), 2021, doi:<a href=\"https://doi.org/10.34133/2021/9861923\">10.34133/2021/9861923</a>.","apa":"Zuo, R., Trautmann, A., Wang, G., Hannes, W.-R., Yang, S., Song, X., Meier, T., Ciappina, M., Duc, H. T., &#38; Yang, W. (2021). Neighboring Atom Collisions in Solid-State High Harmonic Generation. <i>Ultrafast Science</i>, <i>2021</i>. <a href=\"https://doi.org/10.34133/2021/9861923\">https://doi.org/10.34133/2021/9861923</a>"},"publication_identifier":{"issn":["2765-8791"]},"publication_status":"published","language":[{"iso":"eng"}],"_id":"37331","project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"TRR 142: TRR 142","_id":"53"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"_id":"64","name":"TRR 142 - A7: TRR 142 - Subproject A7"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"230"},{"_id":"35"}],"user_id":"16199","abstract":[{"lang":"eng","text":"<jats:p>High harmonic generation (HHG) from solids shows great application prospects in compact short-wavelength light sources and as a tool for imaging the dynamics in crystals with subnanometer spatial and attosecond temporal resolution. However, the underlying collision dynamics behind solid HHG is still intensively debated and no direct mapping relationship between the collision dynamics with band structure has been built. Here, we show that the electron and its associated hole can be elastically scattered by neighboring atoms when their wavelength approaches the atomic size. We reveal that the elastic scattering of electron/hole from neighboring atoms can dramatically influence the electron recombination with its left-behind hole, which turns out to be the fundamental reason for the anisotropic interband HHG observed recently in bulk crystals. Our findings link the electron/hole backward scattering with Van Hove singularities and forward scattering with critical lines in the band structure and thus build a clear mapping between the band structure and the harmonic spectrum. Our work provides a unifying picture for several seemingly unrelated experimental observations and theoretical predictions, including the anisotropic harmonic emission in MgO, the atomic-like recollision mechanism of solid HHG, and the delocalization of HHG in ZnO. This strongly improved understanding will pave the way for controlling the solid-state HHG and visualizing the structure-dependent electron dynamics in solids.</jats:p>"}],"status":"public","publication":"Ultrafast Science","type":"journal_article"},{"publication_identifier":{"issn":["2469-9950","2469-9969"]},"publication_status":"published","year":"2021","page":"085201","intvolume":"       103","citation":{"ama":"Thong LH, Ngo C, Duc HT, Song X, Meier T. Microscopic analysis of high harmonic generation in semiconductors with degenerate bands. <i>Physical Review B</i>. 2021;103:085201. doi:<a href=\"https://doi.org/10.1103/physrevb.103.085201\">10.1103/physrevb.103.085201</a>","ieee":"L. H. Thong, C. Ngo, H. T. Duc, X. Song, and T. Meier, “Microscopic analysis of high harmonic generation in semiconductors with degenerate bands,” <i>Physical Review B</i>, vol. 103, p. 085201, 2021, doi: <a href=\"https://doi.org/10.1103/physrevb.103.085201\">10.1103/physrevb.103.085201</a>.","chicago":"Thong, Le Huu, Cong Ngo, Huynh Thanh Duc, Xiaohong Song, and Torsten Meier. “Microscopic Analysis of High Harmonic Generation in Semiconductors with Degenerate Bands.” <i>Physical Review B</i> 103 (2021): 085201. <a href=\"https://doi.org/10.1103/physrevb.103.085201\">https://doi.org/10.1103/physrevb.103.085201</a>.","apa":"Thong, L. H., Ngo, C., Duc, H. T., Song, X., &#38; Meier, T. (2021). Microscopic analysis of high harmonic generation in semiconductors with degenerate bands. <i>Physical Review B</i>, <i>103</i>, 085201. <a href=\"https://doi.org/10.1103/physrevb.103.085201\">https://doi.org/10.1103/physrevb.103.085201</a>","bibtex":"@article{Thong_Ngo_Duc_Song_Meier_2021, title={Microscopic analysis of high harmonic generation in semiconductors with degenerate bands}, volume={103}, DOI={<a href=\"https://doi.org/10.1103/physrevb.103.085201\">10.1103/physrevb.103.085201</a>}, journal={Physical Review B}, author={Thong, Le Huu and Ngo, Cong and Duc, Huynh Thanh and Song, Xiaohong and Meier, Torsten}, year={2021}, pages={085201} }","mla":"Thong, Le Huu, et al. “Microscopic Analysis of High Harmonic Generation in Semiconductors with Degenerate Bands.” <i>Physical Review B</i>, vol. 103, 2021, p. 085201, doi:<a href=\"https://doi.org/10.1103/physrevb.103.085201\">10.1103/physrevb.103.085201</a>.","short":"L.H. Thong, C. Ngo, H.T. Duc, X. Song, T. Meier, Physical Review B 103 (2021) 085201."},"date_updated":"2023-04-21T11:13:50Z","volume":103,"date_created":"2021-08-24T08:50:33Z","author":[{"first_name":"Le Huu","last_name":"Thong","full_name":"Thong, Le Huu"},{"last_name":"Ngo","full_name":"Ngo, Cong","first_name":"Cong"},{"last_name":"Duc","full_name":"Duc, Huynh Thanh","first_name":"Huynh Thanh"},{"first_name":"Xiaohong","last_name":"Song","full_name":"Song, Xiaohong"},{"first_name":"Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072","full_name":"Meier, Torsten","id":"344"}],"title":"Microscopic analysis of high harmonic generation in semiconductors with degenerate bands","doi":"10.1103/physrevb.103.085201","publication":"Physical Review B","type":"journal_article","status":"public","_id":"23477","project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"230"},{"_id":"35"}],"user_id":"16199","language":[{"iso":"eng"}]},{"citation":{"apa":"Schmidt, F., Kozub, A. L., Gerstmann, U., Schmidt, W. G., &#38; Schindlmayr, A. (2021). Electron polarons in lithium niobate: Charge localization, lattice deformation, and optical response. <i>Crystals</i>, <i>11</i>, 542. <a href=\"https://doi.org/10.3390/cryst11050542\">https://doi.org/10.3390/cryst11050542</a>","bibtex":"@article{Schmidt_Kozub_Gerstmann_Schmidt_Schindlmayr_2021, title={Electron polarons in lithium niobate: Charge localization, lattice deformation, and optical response}, volume={11}, DOI={<a href=\"https://doi.org/10.3390/cryst11050542\">10.3390/cryst11050542</a>}, journal={Crystals}, publisher={MDPI}, author={Schmidt, Falko and Kozub, Agnieszka L. and Gerstmann, Uwe and Schmidt, Wolf Gero and Schindlmayr, Arno}, year={2021}, pages={542} }","mla":"Schmidt, Falko, et al. “Electron Polarons in Lithium Niobate: Charge Localization, Lattice Deformation, and Optical Response.” <i>Crystals</i>, vol. 11, MDPI, 2021, p. 542, doi:<a href=\"https://doi.org/10.3390/cryst11050542\">10.3390/cryst11050542</a>.","short":"F. Schmidt, A.L. Kozub, U. Gerstmann, W.G. Schmidt, A. Schindlmayr, Crystals 11 (2021) 542.","ama":"Schmidt F, Kozub AL, Gerstmann U, Schmidt WG, Schindlmayr A. Electron polarons in lithium niobate: Charge localization, lattice deformation, and optical response. <i>Crystals</i>. 2021;11:542. doi:<a href=\"https://doi.org/10.3390/cryst11050542\">10.3390/cryst11050542</a>","chicago":"Schmidt, Falko, Agnieszka L. Kozub, Uwe Gerstmann, Wolf Gero Schmidt, and Arno Schindlmayr. “Electron Polarons in Lithium Niobate: Charge Localization, Lattice Deformation, and Optical Response.” <i>Crystals</i> 11 (2021): 542. <a href=\"https://doi.org/10.3390/cryst11050542\">https://doi.org/10.3390/cryst11050542</a>.","ieee":"F. Schmidt, A. L. Kozub, U. Gerstmann, W. G. Schmidt, and A. Schindlmayr, “Electron polarons in lithium niobate: Charge localization, lattice deformation, and optical response,” <i>Crystals</i>, vol. 11, p. 542, 2021, doi: <a href=\"https://doi.org/10.3390/cryst11050542\">10.3390/cryst11050542</a>."},"page":"542","intvolume":"        11","publication_status":"published","publication_identifier":{"eissn":["2073-4352"]},"has_accepted_license":"1","doi":"10.3390/cryst11050542","author":[{"full_name":"Schmidt, Falko","id":"35251","orcid":"0000-0002-5071-5528","last_name":"Schmidt","first_name":"Falko"},{"first_name":"Agnieszka L.","full_name":"Kozub, Agnieszka L.","id":"77566","orcid":"https://orcid.org/0000-0001-6584-0201","last_name":"Kozub"},{"id":"171","full_name":"Gerstmann, Uwe","orcid":"0000-0002-4476-223X","last_name":"Gerstmann","first_name":"Uwe"},{"last_name":"Schmidt","orcid":"0000-0002-2717-5076","id":"468","full_name":"Schmidt, Wolf Gero","first_name":"Wolf Gero"},{"id":"458","full_name":"Schindlmayr, Arno","last_name":"Schindlmayr","orcid":"0000-0002-4855-071X","first_name":"Arno"}],"volume":11,"date_updated":"2023-04-21T11:20:15Z","oa":"1","status":"public","type":"journal_article","funded_apc":"1","file_date_updated":"2021-05-13T16:51:41Z","article_type":"original","isi":"1","user_id":"171","department":[{"_id":"296"},{"_id":"230"},{"_id":"429"},{"_id":"295"},{"_id":"15"},{"_id":"170"},{"_id":"35"},{"_id":"790"}],"project":[{"name":"TRR 142","_id":"53"},{"_id":"55","name":"TRR 142 - Project Area B"},{"name":"TRR 142 - Subproject B4","_id":"69"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"21946","year":"2021","quality_controlled":"1","title":"Electron polarons in lithium niobate: Charge localization, lattice deformation, and optical response","date_created":"2021-05-03T09:36:13Z","publisher":"MDPI","file":[{"content_type":"application/pdf","relation":"main_file","creator":"schindlm","date_created":"2021-05-13T16:47:11Z","date_updated":"2021-05-13T16:51:41Z","file_name":"crystals-11-00542.pdf","access_level":"open_access","file_id":"22163","title":"Electron polarons in lithium niobate: Charge localization, lattice deformation, and optical response","file_size":3042827,"description":"Creative Commons Attribution 4.0 International Public License (CC BY 4.0)"}],"abstract":[{"text":"Lithium niobate (LiNbO3), a material frequently used in optical applications, hosts different kinds of polarons that significantly affect many of its physical properties. In this study, a variety of electron polarons, namely free, bound, and bipolarons, are analyzed using first-principles calculations. We perform a full structural optimization based on density-functional theory for selected intrinsic defects with special attention to the role of symmetry-breaking distortions that lower the total energy. The cations hosting the various polarons relax to a different degree, with a larger relaxation corresponding to a larger gap between the defect level and the conduction-band edge. The projected density of states reveals that the polaron states are formerly empty Nb 4d states lowered into the band gap. Optical absorption spectra are derived within the independent-particle approximation, corrected by the GW approximation that yields a wider band gap and by including excitonic effects within the Bethe-Salpeter equation. Comparing the calculated spectra with the density of states, we find that the defect peak observed in the optical absorption stems from transitions between the defect level and a continuum of empty Nb 4d states. Signatures of polarons are further analyzed in the reflectivity and other experimentally measurable optical coefficients.","lang":"eng"}],"publication":"Crystals","language":[{"iso":"eng"}],"ddc":["530"],"external_id":{"isi":["000653822700001"]}},{"series_title":"SPIE Proceedings","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"230"},{"_id":"623"},{"_id":"35"}],"project":[{"name":"TRR 142","_id":"53"},{"name":"TRR 142 - Project Area A","_id":"54"},{"_id":"59","name":"TRR 142 - Subproject A2"},{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"23474","language":[{"iso":"eng"}],"article_number":"116840X","type":"conference","publication":"Ultrafast Phenomena and Nanophotonics XXV","status":"public","editor":[{"first_name":"Markus","last_name":"Betz","full_name":"Betz, Markus"},{"first_name":"Abdulhakem Y.","last_name":"Elezzabi","full_name":"Elezzabi, Abdulhakem Y."}],"author":[{"first_name":"Matthias","id":"138","full_name":"Reichelt, Matthias","last_name":"Reichelt"},{"first_name":"Hendrik","full_name":"Rose, Hendrik","id":"55958","orcid":"0000-0002-3079-5428","last_name":"Rose"},{"first_name":"Alexander N.","last_name":"Kosarev","full_name":"Kosarev, Alexander N."},{"full_name":"Poltavtsev, Sergey V.","last_name":"Poltavtsev","first_name":"Sergey V."},{"first_name":"Manfred","full_name":"Bayer, Manfred","last_name":"Bayer"},{"last_name":"Akimov","full_name":"Akimov, Ilya A.","first_name":"Ilya A."},{"full_name":"Schneider, Christian","last_name":"Schneider","first_name":"Christian"},{"first_name":"Martin","full_name":"Kamp, Martin","last_name":"Kamp"},{"last_name":"Höfling","full_name":"Höfling, Sven","first_name":"Sven"},{"first_name":"Torsten","id":"344","full_name":"Meier, Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072"}],"date_created":"2021-08-24T08:46:40Z","volume":11684,"date_updated":"2023-04-21T11:20:10Z","doi":"10.1117/12.2576887","title":"Controlling the emission time of photon echoes by optical freezing of exciton dephasing and rephasing in quantum-dot ensembles","publication_status":"published","citation":{"apa":"Reichelt, M., Rose, H., Kosarev, A. N., Poltavtsev, S. V., Bayer, M., Akimov, I. A., Schneider, C., Kamp, M., Höfling, S., &#38; Meier, T. (2021). Controlling the emission time of photon echoes by optical freezing of exciton dephasing and rephasing in quantum-dot ensembles. In M. Betz &#38; A. Y. Elezzabi (Eds.), <i>Ultrafast Phenomena and Nanophotonics XXV</i> (No. 116840X; Vol. 11684). <a href=\"https://doi.org/10.1117/12.2576887\">https://doi.org/10.1117/12.2576887</a>","short":"M. Reichelt, H. Rose, A.N. Kosarev, S.V. Poltavtsev, M. Bayer, I.A. Akimov, C. Schneider, M. Kamp, S. Höfling, T. Meier, in: M. Betz, A.Y. Elezzabi (Eds.), Ultrafast Phenomena and Nanophotonics XXV, 2021.","mla":"Reichelt, Matthias, et al. “Controlling the Emission Time of Photon Echoes by Optical Freezing of Exciton Dephasing and Rephasing in Quantum-Dot Ensembles.” <i>Ultrafast Phenomena and Nanophotonics XXV</i>, edited by Markus Betz and Abdulhakem Y. Elezzabi, vol. 11684, 116840X, 2021, doi:<a href=\"https://doi.org/10.1117/12.2576887\">10.1117/12.2576887</a>.","bibtex":"@inproceedings{Reichelt_Rose_Kosarev_Poltavtsev_Bayer_Akimov_Schneider_Kamp_Höfling_Meier_2021, series={SPIE Proceedings}, title={Controlling the emission time of photon echoes by optical freezing of exciton dephasing and rephasing in quantum-dot ensembles}, volume={11684}, DOI={<a href=\"https://doi.org/10.1117/12.2576887\">10.1117/12.2576887</a>}, number={116840X}, booktitle={Ultrafast Phenomena and Nanophotonics XXV}, author={Reichelt, Matthias and Rose, Hendrik and Kosarev, Alexander N. and Poltavtsev, Sergey V. and Bayer, Manfred and Akimov, Ilya A. and Schneider, Christian and Kamp, Martin and Höfling, Sven and Meier, Torsten}, editor={Betz, Markus and Elezzabi, Abdulhakem Y.}, year={2021}, collection={SPIE Proceedings} }","ama":"Reichelt M, Rose H, Kosarev AN, et al. Controlling the emission time of photon echoes by optical freezing of exciton dephasing and rephasing in quantum-dot ensembles. In: Betz M, Elezzabi AY, eds. <i>Ultrafast Phenomena and Nanophotonics XXV</i>. Vol 11684. SPIE Proceedings. ; 2021. doi:<a href=\"https://doi.org/10.1117/12.2576887\">10.1117/12.2576887</a>","chicago":"Reichelt, Matthias, Hendrik Rose, Alexander N. Kosarev, Sergey V. Poltavtsev, Manfred Bayer, Ilya A. Akimov, Christian Schneider, Martin Kamp, Sven Höfling, and Torsten Meier. “Controlling the Emission Time of Photon Echoes by Optical Freezing of Exciton Dephasing and Rephasing in Quantum-Dot Ensembles.” In <i>Ultrafast Phenomena and Nanophotonics XXV</i>, edited by Markus Betz and Abdulhakem Y. Elezzabi, Vol. 11684. SPIE Proceedings, 2021. <a href=\"https://doi.org/10.1117/12.2576887\">https://doi.org/10.1117/12.2576887</a>.","ieee":"M. Reichelt <i>et al.</i>, “Controlling the emission time of photon echoes by optical freezing of exciton dephasing and rephasing in quantum-dot ensembles,” in <i>Ultrafast Phenomena and Nanophotonics XXV</i>, 2021, vol. 11684, doi: <a href=\"https://doi.org/10.1117/12.2576887\">10.1117/12.2576887</a>."},"intvolume":"     11684","year":"2021"},{"intvolume":"       103","page":"L201408","citation":{"chicago":"Nguyen, T. T. Nhung, T. Sollfrank, C. Tegenkamp, E. Rauls, and Uwe Gerstmann. “Impact of Screening and Relaxation on Weakly Coupled Two-Dimensional Heterostructures.” <i>Physical Review B</i> 103 (2021): L201408. <a href=\"https://doi.org/10.1103/physrevb.103.l201408\">https://doi.org/10.1103/physrevb.103.l201408</a>.","ieee":"T. T. N. Nguyen, T. Sollfrank, C. Tegenkamp, E. Rauls, and U. Gerstmann, “Impact of screening and relaxation on weakly coupled two-dimensional heterostructures,” <i>Physical Review B</i>, vol. 103, p. 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