[{"date_updated":"2026-02-09T09:17:07Z","author":[{"first_name":"Xin","last_name":"Wu","full_name":"Wu, Xin","id":"77439"},{"first_name":"Hossam","id":"60250","full_name":"Elgabarty, Hossam","last_name":"Elgabarty","orcid":"0000-0002-4945-1481"},{"last_name":"Alizadeh","full_name":"Alizadeh, Vahideh","first_name":"Vahideh"},{"first_name":"Andres","last_name":"Henao Aristizabal","id":"67235","full_name":"Henao Aristizabal, Andres"},{"first_name":"Frederik","last_name":"Zysk","id":"14757","full_name":"Zysk, Frederik"},{"orcid":"0000-0001-5728-9982","last_name":"Plessl","full_name":"Plessl, Christian","id":"16153","first_name":"Christian"},{"last_name":"Ehlert","full_name":"Ehlert, Sebastian","first_name":"Sebastian"},{"full_name":"Hutter, Jürg","last_name":"Hutter","first_name":"Jürg"},{"full_name":"Kühne, Thomas D.","id":"49079","last_name":"Kühne","first_name":"Thomas D."}],"date_created":"2026-02-09T09:03:41Z","title":"Benchmarking semi-empirical quantum chemical methods on liquid water","main_file_link":[{"url":"https://arxiv.org/abs/2503.11867"}],"year":"2025","citation":{"bibtex":"@article{Wu_Elgabarty_Alizadeh_Henao Aristizabal_Zysk_Plessl_Ehlert_Hutter_Kühne_2025, title={Benchmarking semi-empirical quantum chemical methods on liquid water}, author={Wu, Xin and Elgabarty, Hossam and Alizadeh, Vahideh and Henao Aristizabal, Andres and Zysk, Frederik and Plessl, Christian and Ehlert, Sebastian and Hutter, Jürg and Kühne, Thomas D.}, year={2025} }","short":"X. Wu, H. Elgabarty, V. Alizadeh, A. Henao Aristizabal, F. Zysk, C. Plessl, S. Ehlert, J. Hutter, T.D. Kühne, (2025).","mla":"Wu, Xin, et al. <i>Benchmarking Semi-Empirical Quantum Chemical Methods on Liquid Water</i>. 2025.","apa":"Wu, X., Elgabarty, H., Alizadeh, V., Henao Aristizabal, A., Zysk, F., Plessl, C., Ehlert, S., Hutter, J., &#38; Kühne, T. D. (2025). <i>Benchmarking semi-empirical quantum chemical methods on liquid water</i>.","chicago":"Wu, Xin, Hossam Elgabarty, Vahideh Alizadeh, Andres Henao Aristizabal, Frederik Zysk, Christian Plessl, Sebastian Ehlert, Jürg Hutter, and Thomas D. Kühne. “Benchmarking Semi-Empirical Quantum Chemical Methods on Liquid Water,” 2025.","ieee":"X. Wu <i>et al.</i>, “Benchmarking semi-empirical quantum chemical methods on liquid water.” 2025.","ama":"Wu X, Elgabarty H, Alizadeh V, et al. Benchmarking semi-empirical quantum chemical methods on liquid water. Published online 2025."},"_id":"64071","project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"department":[{"_id":"27"},{"_id":"2"}],"user_id":"77439","language":[{"iso":"eng"}],"type":"preprint","abstract":[{"lang":"eng","text":"Stimulated by the renewed interest and recent developments in semi-empirical quantum chemical (SQC) methods for noncovalent interactions, we examine the properties of liquid water at ambient conditions by means of molecular dynamics (MD) simulations, both with the conventional NDDO-type (neglect of diatomic differential overlap) methods, e.g. AM1 and PM6, and with DFTB-type (density-functional tight-binding) methods, e.g. DFTB2 and GFN-xTB. Besides the original parameter sets, some specifically reparametrized SQC methods (denoted as AM1-W, PM6-fm, and DFTB2-iBi) targeting various smaller water systems ranging from molecular clusters to bulk are considered as well. The quality of these different SQC methods for describing liquid water properties at ambient conditions are assessed by comparison to well-established experimental data and also to BLYP-D3 density functional theory-based ab initio MD simulations. Our analyses reveal that static and dynamics properties of bulk water are poorly described by all considered SQC methods with the original parameters, regardless of the underlying theoretical models, with most of the methods suffering from too weak hydrogen bonds and hence predicting a far too fluid water with highly distorted hydrogen bond kinetics. On the other hand, the reparametrized force-matchcd PM6-fm method is shown to be able to quantitatively reproduce the static and dynamic features of liquid water, and thus can be used as a computationally efficient alternative to electronic structure-based MD simulations for liquid water that requires extended length and time scales. DFTB2-iBi predicts a slightly overstructured water with reduced fluidity, whereas AM1-W gives an amorphous ice-like structure for water at ambient conditions."}],"status":"public"},{"type":"book_chapter","publication":"\"Nicht die Wahrheit wird anerkennt\" - Mathilde Vaerting (1884-1977) Deutungen, Ordnungen und Tradierungen in der Erziehungswissenschaft","editor":[{"full_name":" Berner, Esther","last_name":" Berner","first_name":"Esther"},{"first_name":" Susann","full_name":" Hofbauer ,  Susann","last_name":" Hofbauer "}],"status":"public","_id":"63859","user_id":"95153","department":[{"_id":"723"},{"_id":"724"},{"_id":"935"}],"language":[{"iso":"ger"}],"publication_status":"published","publication_identifier":{"isbn":["9783781527430"]},"edition":"1","year":"2025","place":"Heilbrunn","citation":{"ama":"Vochatzer S, Engelman  S. “...da gerade hier die allgemeinen Theorieen uns nur zu oft im Stiche lassen.” Rousseau in der Kritik gelehrter Frauen seiner Zeit . In:  Berner E,  Hofbauer   Susann, eds. <i>“Nicht die Wahrheit wird anerkennt” - Mathilde Vaerting (1884-1977) Deutungen, Ordnungen und Tradierungen in der Erziehungswissenschaft</i>. 1st ed. Verlag Julius Klinkhardt; 2025:184-197.","chicago":"Vochatzer, Stefanie, and Sebastian  Engelman . “‘...da gerade hier die allgemeinen Theorieen uns nur zu oft im Stiche lassen.’ Rousseau in der Kritik gelehrter Frauen seiner Zeit .” In <i>“Nicht die Wahrheit wird anerkennt” - Mathilde Vaerting (1884-1977) Deutungen, Ordnungen und Tradierungen in der Erziehungswissenschaft</i>, edited by Esther  Berner and  Susann  Hofbauer , 1st ed., 184–97. Heilbrunn: Verlag Julius Klinkhardt, 2025.","ieee":"S. Vochatzer and S. Engelman , “‘...da gerade hier die allgemeinen Theorieen uns nur zu oft im Stiche lassen.’ Rousseau in der Kritik gelehrter Frauen seiner Zeit ,” in <i>“Nicht die Wahrheit wird anerkennt” - Mathilde Vaerting (1884-1977) Deutungen, Ordnungen und Tradierungen in der Erziehungswissenschaft</i>, 1st ed., E.  Berner and  Susann  Hofbauer , Eds. Heilbrunn: Verlag Julius Klinkhardt, 2025, pp. 184–197.","apa":"Vochatzer, S., &#38; Engelman , S. (2025). “...da gerade hier die allgemeinen Theorieen uns nur zu oft im Stiche lassen.” Rousseau in der Kritik gelehrter Frauen seiner Zeit . In E.  Berner &#38;  Susann  Hofbauer  (Eds.), <i>“Nicht die Wahrheit wird anerkennt” - Mathilde Vaerting (1884-1977) Deutungen, Ordnungen und Tradierungen in der Erziehungswissenschaft</i> (1st ed., pp. 184–197). Verlag Julius Klinkhardt.","short":"S. Vochatzer, S. Engelman , in: E.  Berner,  Susann  Hofbauer  (Eds.), “Nicht die Wahrheit wird anerkennt” - Mathilde Vaerting (1884-1977) Deutungen, Ordnungen und Tradierungen in der Erziehungswissenschaft, 1st ed., Verlag Julius Klinkhardt, Heilbrunn, 2025, pp. 184–197.","bibtex":"@inbook{Vochatzer_Engelman _2025, place={Heilbrunn}, edition={1}, title={“...da gerade hier die allgemeinen Theorieen uns nur zu oft im Stiche lassen.” Rousseau in der Kritik gelehrter Frauen seiner Zeit }, booktitle={“Nicht die Wahrheit wird anerkennt” - Mathilde Vaerting (1884-1977) Deutungen, Ordnungen und Tradierungen in der Erziehungswissenschaft}, publisher={Verlag Julius Klinkhardt}, author={Vochatzer, Stefanie and Engelman , Sebastian }, editor={ Berner, Esther and  Hofbauer ,  Susann}, year={2025}, pages={184–197} }","mla":"Vochatzer, Stefanie, and Sebastian Engelman . “‘...da gerade hier die allgemeinen Theorieen uns nur zu oft im Stiche lassen.’ Rousseau in der Kritik gelehrter Frauen seiner Zeit .” <i>“Nicht die Wahrheit wird anerkennt” - Mathilde Vaerting (1884-1977) Deutungen, Ordnungen und Tradierungen in der Erziehungswissenschaft</i>, edited by Esther  Berner and  Susann  Hofbauer , 1st ed., Verlag Julius Klinkhardt, 2025, pp. 184–97."},"page":"184-197","date_updated":"2026-02-09T10:33:51Z","publisher":"Verlag Julius Klinkhardt","author":[{"first_name":"Stefanie","last_name":"Vochatzer","full_name":"Vochatzer, Stefanie","id":"95153"},{"last_name":"Engelman ","full_name":"Engelman , Sebastian ","first_name":"Sebastian "}],"date_created":"2026-02-04T07:11:59Z","title":"\"...da gerade hier die allgemeinen Theorieen uns nur zu oft im Stiche lassen.\" Rousseau in der Kritik gelehrter Frauen seiner Zeit "},{"title":"Erziehung zur Hausfrau und Mutter? Geschlechterspezifische Umbrüche in der Mädchenerziehung des 18. Jahrhunderts","publisher":"Winter ","date_updated":"2026-02-09T10:32:22Z","date_created":"2026-02-04T21:41:49Z","author":[{"first_name":"Stefanie","last_name":"Vochatzer","id":"95153","full_name":"Vochatzer, Stefanie"}],"place":"Heidelberg","year":"2025","page":"61-76","citation":{"bibtex":"@inbook{Vochatzer_2025, place={Heidelberg}, title={Erziehung zur Hausfrau und Mutter? Geschlechterspezifische Umbrüche in der Mädchenerziehung des 18. Jahrhunderts}, booktitle={Stand, Beruf(ung), Geschlecht - Umbrüche und Transformationsprozess im gesellschaftlichen und kulturellen Wandel}, publisher={Winter }, author={Vochatzer, Stefanie}, editor={ Bill-Mrziglod, Michaela and Schäfer-Althaus, Sarah}, year={2025}, pages={61–76} }","mla":"Vochatzer, Stefanie. “Erziehung zur Hausfrau und Mutter? Geschlechterspezifische Umbrüche in der Mädchenerziehung des 18. Jahrhunderts.” <i>Stand, Beruf(ung), Geschlecht - Umbrüche und Transformationsprozess im gesellschaftlichen und kulturellen Wandel</i>, edited by Michaela  Bill-Mrziglod and Sarah Schäfer-Althaus, Winter , 2025, pp. 61–76.","short":"S. Vochatzer, in: M.  Bill-Mrziglod, S. Schäfer-Althaus (Eds.), Stand, Beruf(ung), Geschlecht - Umbrüche und Transformationsprozess im gesellschaftlichen und kulturellen Wandel, Winter , Heidelberg, 2025, pp. 61–76.","apa":"Vochatzer, S. (2025). Erziehung zur Hausfrau und Mutter? Geschlechterspezifische Umbrüche in der Mädchenerziehung des 18. Jahrhunderts. In M.  Bill-Mrziglod &#38; S. Schäfer-Althaus (Eds.), <i>Stand, Beruf(ung), Geschlecht - Umbrüche und Transformationsprozess im gesellschaftlichen und kulturellen Wandel</i> (pp. 61–76). Winter .","ama":"Vochatzer S. Erziehung zur Hausfrau und Mutter? Geschlechterspezifische Umbrüche in der Mädchenerziehung des 18. Jahrhunderts. In:  Bill-Mrziglod M, Schäfer-Althaus S, eds. <i>Stand, Beruf(ung), Geschlecht - Umbrüche und Transformationsprozess im gesellschaftlichen und kulturellen Wandel</i>. Winter ; 2025:61-76.","ieee":"S. Vochatzer, “Erziehung zur Hausfrau und Mutter? Geschlechterspezifische Umbrüche in der Mädchenerziehung des 18. Jahrhunderts,” in <i>Stand, Beruf(ung), Geschlecht - Umbrüche und Transformationsprozess im gesellschaftlichen und kulturellen Wandel</i>, M.  Bill-Mrziglod and S. Schäfer-Althaus, Eds. Heidelberg: Winter , 2025, pp. 61–76.","chicago":"Vochatzer, Stefanie. “Erziehung zur Hausfrau und Mutter? Geschlechterspezifische Umbrüche in der Mädchenerziehung des 18. Jahrhunderts.” In <i>Stand, Beruf(ung), Geschlecht - Umbrüche und Transformationsprozess im gesellschaftlichen und kulturellen Wandel</i>, edited by Michaela  Bill-Mrziglod and Sarah Schäfer-Althaus, 61–76. Heidelberg: Winter , 2025."},"publication_identifier":{"isbn":["978-3-8253-9689-3"]},"publication_status":"published","language":[{"iso":"ger"}],"_id":"63876","user_id":"95153","editor":[{"first_name":"Michaela","last_name":" Bill-Mrziglod","full_name":" Bill-Mrziglod, Michaela"},{"full_name":"Schäfer-Althaus, Sarah","last_name":"Schäfer-Althaus","first_name":"Sarah"}],"status":"public","publication":"Stand, Beruf(ung), Geschlecht - Umbrüche und Transformationsprozess im gesellschaftlichen und kulturellen Wandel","type":"book_chapter"},{"year":"2025","issue":"1","title":"Deep learning for classifying quantum emission signals in WS2 monolayers using wavelet transform","publisher":"Springer Science and Business Media LLC","date_created":"2026-02-09T15:39:46Z","abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title>\r\n                  <jats:p>\r\n                    This study aimed to develop and evaluate deep learning approaches for the classification of quantum emission signals from WS\r\n                    <jats:sub>2</jats:sub>\r\n                    monolayer nanobubbles across multiple spectral bands, addressing challenges in quantum materials characterization and spectral distinguishability assessment. We utilized a dataset of quantum emission signals ranging from 604 to 629 nm, emitted from WS₂ monolayer nanobubbles on gold substrates, categorized into four spectral bands (604.06–608.24 nm, 611.07–616.34 nm, 617.42–623.35 nm, and 624.16–636.57 nm). Our methodology involved signal preprocessing through normalization and moving average smoothing, followed by transformation into 128 × 128 RGB images using Continuous Wavelet Transform (CWT) with Complex Morlet wavelet. Three convolutional neural network architectures (ResNet50, VGG16, and Xception) were implemented and evaluated using fivefold cross-validation across six possible band pair combinations. All models demonstrated exceptional classification performance, with VGG16 achieving the highest overall mean accuracy of 99.4%, followed by Xception (99.1%) and ResNet50 (98.2%). Perfect classification accuracy (100%) was consistently achieved for spectrally distant band pairs, particularly Band 1 versus Band 4 (20.5 nm separation), while the most challenging classification involved adjacent bands (Band 2 vs. Band 3, 6.27 nm separation) with VGG16 achieving 96.5% accuracy. Statistical analysis using Friedman tests confirmed significant performance differences among models (χ\r\n                    <jats:sup>2</jats:sup>\r\n                     = 8.67,\r\n                    <jats:italic>p</jats:italic>\r\n                     = 0.013). Xception demonstrated remarkable computational efficiency, achieving optimal convergence in as few as 2 epochs for certain band combinations while maintaining ultralow training loss values (8.23 × 10⁻\r\n                    <jats:sup>6</jats:sup>\r\n                    ). Deep learning models, particularly when combined with CWT preprocessing, provide a robust framework for quantum emission signal classification with significant implications for quantum photonics, quantum cryptography, and quantum sensing applications. Our approach bridges the gap between classical machine learning and quantum materials characterization, establishing quantifiable metrics for evaluating spectral distinguishability in quantum information systems. The demonstrated ability to achieve high classification accuracy with minimal training through transfer learning addresses data scarcity challenges inherent to quantum systems, offering a promising direction for future quantum technology development.\r\n                  </jats:p>"}],"file":[{"success":1,"relation":"main_file","content_type":"application/pdf","file_size":8472739,"file_id":"64087","file_name":"s41598-025-29120-0.pdf","access_level":"closed","date_updated":"2026-02-09T15:40:15Z","date_created":"2026-02-09T15:40:15Z","creator":"zraissi"}],"publication":"Scientific Reports","ddc":["000"],"language":[{"iso":"eng"}],"citation":{"bibtex":"@article{Najafzadeh_Raissi_Golmohammady_Kaji_Esmaeili_2025, title={Deep learning for classifying quantum emission signals in WS2 monolayers using wavelet transform}, volume={15}, DOI={<a href=\"https://doi.org/10.1038/s41598-025-29120-0\">10.1038/s41598-025-29120-0</a>}, number={141470}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Najafzadeh, Hossein and Raissi, Zahra and Golmohammady, Shole and Kaji, Parivash Safari and Esmaeili, Mahdad}, year={2025} }","short":"H. Najafzadeh, Z. Raissi, S. Golmohammady, P.S. Kaji, M. Esmaeili, Scientific Reports 15 (2025).","mla":"Najafzadeh, Hossein, et al. “Deep Learning for Classifying Quantum Emission Signals in WS2 Monolayers Using Wavelet Transform.” <i>Scientific Reports</i>, vol. 15, no. 1, 41470, Springer Science and Business Media LLC, 2025, doi:<a href=\"https://doi.org/10.1038/s41598-025-29120-0\">10.1038/s41598-025-29120-0</a>.","apa":"Najafzadeh, H., Raissi, Z., Golmohammady, S., Kaji, P. S., &#38; Esmaeili, M. (2025). Deep learning for classifying quantum emission signals in WS2 monolayers using wavelet transform. <i>Scientific Reports</i>, <i>15</i>(1), Article 41470. <a href=\"https://doi.org/10.1038/s41598-025-29120-0\">https://doi.org/10.1038/s41598-025-29120-0</a>","ieee":"H. Najafzadeh, Z. Raissi, S. Golmohammady, P. S. Kaji, and M. Esmaeili, “Deep learning for classifying quantum emission signals in WS2 monolayers using wavelet transform,” <i>Scientific Reports</i>, vol. 15, no. 1, Art. no. 41470, 2025, doi: <a href=\"https://doi.org/10.1038/s41598-025-29120-0\">10.1038/s41598-025-29120-0</a>.","chicago":"Najafzadeh, Hossein, Zahra Raissi, Shole Golmohammady, Parivash Safari Kaji, and Mahdad Esmaeili. “Deep Learning for Classifying Quantum Emission Signals in WS2 Monolayers Using Wavelet Transform.” <i>Scientific Reports</i> 15, no. 1 (2025). <a href=\"https://doi.org/10.1038/s41598-025-29120-0\">https://doi.org/10.1038/s41598-025-29120-0</a>.","ama":"Najafzadeh H, Raissi Z, Golmohammady S, Kaji PS, Esmaeili M. Deep learning for classifying quantum emission signals in WS2 monolayers using wavelet transform. <i>Scientific Reports</i>. 2025;15(1). doi:<a href=\"https://doi.org/10.1038/s41598-025-29120-0\">10.1038/s41598-025-29120-0</a>"},"intvolume":"        15","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["2045-2322"]},"doi":"10.1038/s41598-025-29120-0","date_updated":"2026-02-09T17:07:08Z","author":[{"first_name":"Hossein","last_name":"Najafzadeh","full_name":"Najafzadeh, Hossein"},{"first_name":"Zahra","full_name":"Raissi, Zahra","last_name":"Raissi"},{"first_name":"Shole","full_name":"Golmohammady, Shole","last_name":"Golmohammady"},{"first_name":"Parivash Safari","last_name":"Kaji","full_name":"Kaji, Parivash Safari"},{"first_name":"Mahdad","last_name":"Esmaeili","full_name":"Esmaeili, Mahdad"}],"volume":15,"status":"public","type":"journal_article","article_number":"41470","file_date_updated":"2026-02-09T15:40:15Z","_id":"64086","user_id":"98836"},{"publication_status":"published","publication_identifier":{"issn":["1751-8113","1751-8121"]},"has_accepted_license":"1","citation":{"ama":"Revis K-R, Zakaryan H, Raissi Z. χ-colorable graph states: closed-form expressions and quantum orthogonal arrays. <i>Journal of Physics A: Mathematical and Theoretical</i>. 2025;58(35). doi:<a href=\"https://doi.org/10.1088/1751-8121/adfe45\">10.1088/1751-8121/adfe45</a>","chicago":"Revis, Konstantinos-Rafail, Hrachya Zakaryan, and Zahra Raissi. “χ-Colorable Graph States: Closed-Form Expressions and Quantum Orthogonal Arrays.” <i>Journal of Physics A: Mathematical and Theoretical</i> 58, no. 35 (2025). <a href=\"https://doi.org/10.1088/1751-8121/adfe45\">https://doi.org/10.1088/1751-8121/adfe45</a>.","ieee":"K.-R. Revis, H. Zakaryan, and Z. Raissi, “χ-colorable graph states: closed-form expressions and quantum orthogonal arrays,” <i>Journal of Physics A: Mathematical and Theoretical</i>, vol. 58, no. 35, Art. no. 355301, 2025, doi: <a href=\"https://doi.org/10.1088/1751-8121/adfe45\">10.1088/1751-8121/adfe45</a>.","bibtex":"@article{Revis_Zakaryan_Raissi_2025, title={χ-colorable graph states: closed-form expressions and quantum orthogonal arrays}, volume={58}, DOI={<a href=\"https://doi.org/10.1088/1751-8121/adfe45\">10.1088/1751-8121/adfe45</a>}, number={35355301}, journal={Journal of Physics A: Mathematical and Theoretical}, publisher={IOP Publishing}, author={Revis, Konstantinos-Rafail and Zakaryan, Hrachya and Raissi, Zahra}, year={2025} }","mla":"Revis, Konstantinos-Rafail, et al. “χ-Colorable Graph States: Closed-Form Expressions and Quantum Orthogonal Arrays.” <i>Journal of Physics A: Mathematical and Theoretical</i>, vol. 58, no. 35, 355301, IOP Publishing, 2025, doi:<a href=\"https://doi.org/10.1088/1751-8121/adfe45\">10.1088/1751-8121/adfe45</a>.","short":"K.-R. Revis, H. Zakaryan, Z. Raissi, Journal of Physics A: Mathematical and Theoretical 58 (2025).","apa":"Revis, K.-R., Zakaryan, H., &#38; Raissi, Z. (2025). χ-colorable graph states: closed-form expressions and quantum orthogonal arrays. <i>Journal of Physics A: Mathematical and Theoretical</i>, <i>58</i>(35), Article 355301. <a href=\"https://doi.org/10.1088/1751-8121/adfe45\">https://doi.org/10.1088/1751-8121/adfe45</a>"},"intvolume":"        58","date_updated":"2026-02-09T17:07:25Z","author":[{"first_name":"Konstantinos-Rafail","last_name":"Revis","full_name":"Revis, Konstantinos-Rafail"},{"first_name":"Hrachya","full_name":"Zakaryan, Hrachya","last_name":"Zakaryan"},{"first_name":"Zahra","last_name":"Raissi","full_name":"Raissi, Zahra"}],"volume":58,"doi":"10.1088/1751-8121/adfe45","type":"journal_article","status":"public","_id":"64081","user_id":"98836","article_number":"355301","file_date_updated":"2026-02-09T15:35:25Z","issue":"35","year":"2025","publisher":"IOP Publishing","date_created":"2026-02-09T15:35:00Z","title":"χ-colorable graph states: closed-form expressions and quantum orthogonal arrays","publication":"Journal of Physics A: Mathematical and Theoretical","abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>Graph states are a fundamental class of multipartite entangled quantum states with wide-ranging applications in quantum information and computation. In this work, we develop a systematic approach for constructing and analyzing <jats:italic>χ</jats:italic>-colorable graph states, deriving explicit closed-form expressions for arbitrary <jats:italic>χ</jats:italic>. For a broad family of two- and three-colorable graph states, the representations obtained using only local operations require a minimal number of terms in the <jats:italic>Z</jats:italic>-eigenbasis. We prove that every two-colorable graph state is local Clifford (LC) equivalent to a state expressible as a summation of rows of an orthogonal array (OA). For graph states with <jats:italic>χ</jats:italic> &gt; 2, we show that they are LC-equivalent to quantum OAs, establishing a direct combinatorial connection between multipartite entanglement and structured quantum states. Furthermore, the upper and lower bounds of the Schmidt measure for graph states with arbitrary <jats:italic>χ</jats:italic> colorability are discussed, extending the results for an arbitrary local dimension. Our results offer an efficient and practical method for systematically constructing graph states, optimizing their representation in quantum circuits, and identifying structured forms of multipartite entanglement. This approach also connects graph states to <jats:italic>k</jats:italic>-uniform and absolutely maximally entangled states, motivating further exploration of the structure of entangled states and their applications in quantum networks, quantum error correction, and measurement based quantum computing.</jats:p>","lang":"eng"}],"file":[{"relation":"main_file","success":1,"content_type":"application/pdf","file_id":"64082","file_name":"Revis_2025_J._Phys._A%3A_Math._Theor._58_355301.pdf","access_level":"closed","file_size":749441,"date_created":"2026-02-09T15:35:25Z","creator":"zraissi","date_updated":"2026-02-09T15:35:25Z"}],"ddc":["004"],"language":[{"iso":"eng"}]},{"year":"2025","intvolume":"       112","citation":{"ama":"Zakaryan H, Revis K-R, Raissi Z. Nonsymmetric Greenberger-Horne-Zeilinger states: Weighted hypergraph and controlled-unitary graph representations. <i>Physical Review A</i>. 2025;112(3). doi:<a href=\"https://doi.org/10.1103/7zxj-jp34\">10.1103/7zxj-jp34</a>","chicago":"Zakaryan, Hrachya, Konstantinos-Rafail Revis, and Zahra Raissi. “Nonsymmetric Greenberger-Horne-Zeilinger States: Weighted Hypergraph and Controlled-Unitary Graph Representations.” <i>Physical Review A</i> 112, no. 3 (2025). <a href=\"https://doi.org/10.1103/7zxj-jp34\">https://doi.org/10.1103/7zxj-jp34</a>.","ieee":"H. Zakaryan, K.-R. Revis, and Z. Raissi, “Nonsymmetric Greenberger-Horne-Zeilinger states: Weighted hypergraph and controlled-unitary graph representations,” <i>Physical Review A</i>, vol. 112, no. 3, Art. no. 032438, 2025, doi: <a href=\"https://doi.org/10.1103/7zxj-jp34\">10.1103/7zxj-jp34</a>.","apa":"Zakaryan, H., Revis, K.-R., &#38; Raissi, Z. (2025). Nonsymmetric Greenberger-Horne-Zeilinger states: Weighted hypergraph and controlled-unitary graph representations. <i>Physical Review A</i>, <i>112</i>(3), Article 032438. <a href=\"https://doi.org/10.1103/7zxj-jp34\">https://doi.org/10.1103/7zxj-jp34</a>","short":"H. Zakaryan, K.-R. Revis, Z. Raissi, Physical Review A 112 (2025).","mla":"Zakaryan, Hrachya, et al. “Nonsymmetric Greenberger-Horne-Zeilinger States: Weighted Hypergraph and Controlled-Unitary Graph Representations.” <i>Physical Review A</i>, vol. 112, no. 3, 032438, American Physical Society (APS), 2025, doi:<a href=\"https://doi.org/10.1103/7zxj-jp34\">10.1103/7zxj-jp34</a>.","bibtex":"@article{Zakaryan_Revis_Raissi_2025, title={Nonsymmetric Greenberger-Horne-Zeilinger states: Weighted hypergraph and controlled-unitary graph representations}, volume={112}, DOI={<a href=\"https://doi.org/10.1103/7zxj-jp34\">10.1103/7zxj-jp34</a>}, number={3032438}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Zakaryan, Hrachya and Revis, Konstantinos-Rafail and Raissi, Zahra}, year={2025} }"},"has_accepted_license":"1","publication_identifier":{"issn":["2469-9926","2469-9934"]},"publication_status":"published","issue":"3","title":"Nonsymmetric Greenberger-Horne-Zeilinger states: Weighted hypergraph and controlled-unitary graph representations","doi":"10.1103/7zxj-jp34","publisher":"American Physical Society (APS)","date_updated":"2026-02-09T17:07:30Z","volume":112,"date_created":"2026-02-09T15:33:15Z","author":[{"full_name":"Zakaryan, Hrachya","last_name":"Zakaryan","first_name":"Hrachya"},{"last_name":"Revis","full_name":"Revis, Konstantinos-Rafail","first_name":"Konstantinos-Rafail"},{"last_name":"Raissi","full_name":"Raissi, Zahra","first_name":"Zahra"}],"status":"public","file":[{"success":1,"relation":"main_file","content_type":"application/pdf","file_size":513529,"file_id":"64079","file_name":"7zxj-jp34.pdf","access_level":"closed","date_updated":"2026-02-09T15:34:09Z","date_created":"2026-02-09T15:34:09Z","creator":"zraissi"}],"publication":"Physical Review A","type":"journal_article","article_number":"032438","language":[{"iso":"eng"}],"file_date_updated":"2026-02-09T15:34:09Z","_id":"64078","user_id":"98836"},{"citation":{"mla":"Revis, Konstantinos-Rafail, et al. “Orbit Classification and Analysis of Qutrit Graph States under Local Complementation and Local Scaling.” <i>Https://Arxiv.Org/Pdf/2506.05478</i>, 2025.","bibtex":"@article{Revis_Zakaryan_Raissi_2025, title={Orbit classification and analysis of qutrit graph states under local complementation and local scaling}, journal={https://arxiv.org/pdf/2506.05478}, author={Revis, Konstantinos-Rafail and Zakaryan, Hrachya and Raissi, Zahra}, year={2025} }","short":"K.-R. Revis, H. Zakaryan, Z. Raissi, Https://Arxiv.Org/Pdf/2506.05478 (2025).","apa":"Revis, K.-R., Zakaryan, H., &#38; Raissi, Z. (2025). Orbit classification and analysis of qutrit graph states under local complementation and local scaling. In <i>https://arxiv.org/pdf/2506.05478</i>.","ieee":"K.-R. Revis, H. Zakaryan, and Z. Raissi, “Orbit classification and analysis of qutrit graph states under local complementation and local scaling,” <i>https://arxiv.org/pdf/2506.05478</i>. 2025.","chicago":"Revis, Konstantinos-Rafail, Hrachya Zakaryan, and Zahra Raissi. “Orbit Classification and Analysis of Qutrit Graph States under Local Complementation and Local Scaling.” <i>Https://Arxiv.Org/Pdf/2506.05478</i>, 2025.","ama":"Revis K-R, Zakaryan H, Raissi Z. Orbit classification and analysis of qutrit graph states under local complementation and local scaling. <i>https://arxiv.org/pdf/250605478</i>. Published online 2025."},"year":"2025","has_accepted_license":"1","title":"Orbit classification and analysis of qutrit graph states under local complementation and local scaling","author":[{"last_name":"Revis","full_name":"Revis, Konstantinos-Rafail","first_name":"Konstantinos-Rafail"},{"full_name":"Zakaryan, Hrachya","last_name":"Zakaryan","first_name":"Hrachya"},{"full_name":"Raissi, Zahra","last_name":"Raissi","first_name":"Zahra"}],"date_created":"2026-02-09T15:44:35Z","date_updated":"2026-02-09T17:07:04Z","status":"public","file":[{"date_created":"2026-02-09T15:43:52Z","creator":"zraissi","date_updated":"2026-02-09T15:43:52Z","file_name":"2506.05478v1.pdf","access_level":"closed","file_id":"64090","file_size":1702228,"content_type":"application/pdf","relation":"main_file","success":1}],"publication":"https://arxiv.org/pdf/2506.05478","type":"preprint","language":[{"iso":"eng"}],"file_date_updated":"2026-02-09T15:43:52Z","ddc":["000"],"user_id":"98836","_id":"64089"},{"date_created":"2026-02-09T15:46:36Z","author":[{"full_name":" Bl ̈omer, Johannes","last_name":" Bl ̈omer","first_name":"Johannes"},{"first_name":"Yinzi ","full_name":"Xiao, Yinzi ","last_name":"Xiao"},{"first_name":"Zahra","full_name":"Raissi, Zahra","last_name":"Raissi"},{"first_name":"Stanislaw ","last_name":"Soltan","full_name":"Soltan, Stanislaw "}],"date_updated":"2026-02-09T17:06:57Z","title":"Symplectic Lattices and GKP Codes - Simple Randomized Constructions from Cryptographic Lattices","has_accepted_license":"1","citation":{"ama":"Bl ̈omer J, Xiao Y, Raissi Z, Soltan S. Symplectic Lattices and GKP Codes - Simple Randomized Constructions from Cryptographic Lattices. <i>https://arxiv.org/pdf/250910183</i>. Published online 2025.","chicago":"Bl ̈omer, Johannes, Yinzi  Xiao, Zahra Raissi, and Stanislaw  Soltan. “Symplectic Lattices and GKP Codes - Simple Randomized Constructions from Cryptographic Lattices.” <i>Https://Arxiv.Org/Pdf/2509.10183</i>, 2025.","ieee":"J.  Bl ̈omer, Y. Xiao, Z. Raissi, and S. Soltan, “Symplectic Lattices and GKP Codes - Simple Randomized Constructions from Cryptographic Lattices,” <i>https://arxiv.org/pdf/2509.10183</i>. 2025.","mla":"Bl ̈omer, Johannes, et al. “Symplectic Lattices and GKP Codes - Simple Randomized Constructions from Cryptographic Lattices.” <i>Https://Arxiv.Org/Pdf/2509.10183</i>, 2025.","bibtex":"@article{ Bl ̈omer_Xiao_Raissi_Soltan_2025, title={Symplectic Lattices and GKP Codes - Simple Randomized Constructions from Cryptographic Lattices}, journal={https://arxiv.org/pdf/2509.10183}, author={ Bl ̈omer, Johannes and Xiao, Yinzi  and Raissi, Zahra and Soltan, Stanislaw }, year={2025} }","short":"J.  Bl ̈omer, Y. Xiao, Z. Raissi, S. Soltan, Https://Arxiv.Org/Pdf/2509.10183 (2025).","apa":"Bl ̈omer, J., Xiao, Y., Raissi, Z., &#38; Soltan, S. (2025). Symplectic Lattices and GKP Codes - Simple Randomized Constructions from Cryptographic Lattices. In <i>https://arxiv.org/pdf/2509.10183</i>."},"year":"2025","user_id":"98836","_id":"64091","language":[{"iso":"eng"}],"file_date_updated":"2026-02-09T15:46:09Z","ddc":["000"],"type":"preprint","publication":"https://arxiv.org/pdf/2509.10183","file":[{"success":1,"relation":"main_file","content_type":"application/pdf","file_size":991597,"access_level":"closed","file_id":"64092","file_name":"2509.10183v1-2.pdf","date_updated":"2026-02-09T15:46:09Z","date_created":"2026-02-09T15:46:09Z","creator":"zraissi"}],"status":"public"},{"year":"2025","citation":{"ama":"Barakat I, Kalash M, Scharwald D, Sharapova P, Lindlein N, Chekhova M. Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification. <i>Optica Quantum</i>. 2025;3(1). doi:<a href=\"https://doi.org/10.1364/opticaq.524682\">10.1364/opticaq.524682</a>","ieee":"I. Barakat, M. Kalash, D. Scharwald, P. Sharapova, N. Lindlein, and M. Chekhova, “Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification,” <i>Optica Quantum</i>, vol. 3, no. 1, Art. no. 36, 2025, doi: <a href=\"https://doi.org/10.1364/opticaq.524682\">10.1364/opticaq.524682</a>.","chicago":"Barakat, Ismail, Mahmoud Kalash, Dennis Scharwald, Polina Sharapova, Norbert Lindlein, and Maria Chekhova. “Simultaneous Measurement of Multimode Squeezing through Multimode Phase-Sensitive Amplification.” <i>Optica Quantum</i> 3, no. 1 (2025). <a href=\"https://doi.org/10.1364/opticaq.524682\">https://doi.org/10.1364/opticaq.524682</a>.","bibtex":"@article{Barakat_Kalash_Scharwald_Sharapova_Lindlein_Chekhova_2025, title={Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification}, volume={3}, DOI={<a href=\"https://doi.org/10.1364/opticaq.524682\">10.1364/opticaq.524682</a>}, number={136}, journal={Optica Quantum}, publisher={Optica Publishing Group}, author={Barakat, Ismail and Kalash, Mahmoud and Scharwald, Dennis and Sharapova, Polina and Lindlein, Norbert and Chekhova, Maria}, year={2025} }","short":"I. Barakat, M. Kalash, D. Scharwald, P. Sharapova, N. Lindlein, M. Chekhova, Optica Quantum 3 (2025).","mla":"Barakat, Ismail, et al. “Simultaneous Measurement of Multimode Squeezing through Multimode Phase-Sensitive Amplification.” <i>Optica Quantum</i>, vol. 3, no. 1, 36, Optica Publishing Group, 2025, doi:<a href=\"https://doi.org/10.1364/opticaq.524682\">10.1364/opticaq.524682</a>.","apa":"Barakat, I., Kalash, M., Scharwald, D., Sharapova, P., Lindlein, N., &#38; Chekhova, M. (2025). Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification. <i>Optica Quantum</i>, <i>3</i>(1), Article 36. <a href=\"https://doi.org/10.1364/opticaq.524682\">https://doi.org/10.1364/opticaq.524682</a>"},"intvolume":"         3","publication_status":"published","publication_identifier":{"issn":["2837-6714"]},"issue":"1","title":"Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification","main_file_link":[{"open_access":"1","url":"https://opg.optica.org/opticaq/viewmedia.cfm?uri=opticaq-3-1-36&seq=0"}],"doi":"10.1364/opticaq.524682","publisher":"Optica Publishing Group","oa":"1","date_updated":"2026-02-10T22:44:44Z","author":[{"first_name":"Ismail","full_name":"Barakat, Ismail","last_name":"Barakat"},{"last_name":"Kalash","full_name":"Kalash, Mahmoud","first_name":"Mahmoud"},{"first_name":"Dennis","id":"55907","full_name":"Scharwald, Dennis","orcid":"0009-0007-5654-5412","last_name":"Scharwald"},{"last_name":"Sharapova","id":"60286","full_name":"Sharapova, Polina","first_name":"Polina"},{"full_name":"Lindlein, Norbert","last_name":"Lindlein","first_name":"Norbert"},{"full_name":"Chekhova, Maria","last_name":"Chekhova","first_name":"Maria"}],"date_created":"2026-01-26T15:57:13Z","volume":3,"abstract":[{"text":"Multimode squeezed light is an increasingly popular tool in photonic quantum technologies, including sensing, imaging, and computation. Meanwhile, the existing methods of its characterization are technically complicated, which reduces the level of squeezing, and mostly deal with a single mode at a time. Here, for the first time, to the best of our knowledge, we employ optical parametric amplification to characterize multiple squeezing eigenmodes simultaneously. We retrieve the shapes and squeezing degrees of all modes at once through direct detection followed by modal decomposition. This method is tolerant to inefficient detection and does not require a local oscillator. For a spectrally and spatially multimode squeezed vacuum, we characterize eight strongest spatial modes, obtaining squeezing and anti-squeezing values of up to −5.2 ± 0.2 dB and 8.6 ± 0.3 dB, respectively, despite the 50% detection loss. This work, being the first exploration of an optical parametric amplifier’s multimode capability for squeezing detection, paves the way for the real-time detection of multimode squeezing.","lang":"eng"}],"status":"public","type":"journal_article","publication":"Optica Quantum","article_number":"36","article_type":"original","language":[{"iso":"eng"}],"project":[{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"name":"TRR 142 - Project Area C","_id":"56"},{"_id":"174","name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"63745","user_id":"55907","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"35"},{"_id":"429"}]},{"language":[{"iso":"eng"}],"user_id":"95153","department":[{"_id":"723"},{"_id":"724"},{"_id":"935"}],"publication_date":"18.08.2025 ","_id":"63871","status":"public","type":"review","publication":"H-Soz-Kult","main_file_link":[{"url":"https://www.hsozkult.de/publicationreview/id/reb-142262."}],"title":"Rezension zu: Wasmuth, Helge; Sauerbrey, Ulf; Winkler, Michael: Finding Froebel. The Man Who Invented Kindergarten. New York 2023 ","author":[{"id":"95153","full_name":"Vochatzer, Stefanie","last_name":"Vochatzer","first_name":"Stefanie"}],"date_created":"2026-02-04T13:45:36Z","date_updated":"2026-02-10T20:40:54Z","citation":{"ama":"Vochatzer S. Rezension zu: Wasmuth, Helge; Sauerbrey, Ulf; Winkler, Michael: Finding Froebel. The Man Who Invented Kindergarten. New York 2023 . <i>H-Soz-Kult</i>. Published online 2025.","chicago":"Vochatzer, Stefanie. “Rezension Zu: Wasmuth, Helge; Sauerbrey, Ulf; Winkler, Michael: Finding Froebel. The Man Who Invented Kindergarten. New York 2023 .” <i>H-Soz-Kult</i>, 2025.","ieee":"S. Vochatzer, “Rezension zu: Wasmuth, Helge; Sauerbrey, Ulf; Winkler, Michael: Finding Froebel. The Man Who Invented Kindergarten. New York 2023 ,” <i>H-Soz-Kult</i>. 2025.","apa":"Vochatzer, S. (2025). Rezension zu: Wasmuth, Helge; Sauerbrey, Ulf; Winkler, Michael: Finding Froebel. The Man Who Invented Kindergarten. New York 2023 . In <i>H-Soz-Kult</i>.","mla":"Vochatzer, Stefanie. “Rezension Zu: Wasmuth, Helge; Sauerbrey, Ulf; Winkler, Michael: Finding Froebel. The Man Who Invented Kindergarten. New York 2023 .” <i>H-Soz-Kult</i>, 2025.","short":"S. Vochatzer, H-Soz-Kult (2025).","bibtex":"@article{Vochatzer_2025, title={Rezension zu: Wasmuth, Helge; Sauerbrey, Ulf; Winkler, Michael: Finding Froebel. The Man Who Invented Kindergarten. New York 2023 }, journal={H-Soz-Kult}, author={Vochatzer, Stefanie}, year={2025} }"},"year":"2025","publication_status":"published","publication_identifier":{"isbn":["9781350269248"]}},{"department":[{"_id":"79"}],"user_id":"15578","_id":"62285","type":"conference","status":"public","editor":[{"full_name":"Bonomi, Silvia","last_name":"Bonomi","first_name":"Silvia"},{"first_name":"Partha Sarathi","full_name":"Mandal, Partha Sarathi","last_name":"Mandal"},{"first_name":"Peter","full_name":"Robinson, Peter","last_name":"Robinson"},{"first_name":"Gokarna","full_name":"Sharma, Gokarna","last_name":"Sharma"},{"full_name":"Tixeuil, Sebastien","last_name":"Tixeuil","first_name":"Sebastien"}],"author":[{"last_name":"Kostitsyna","full_name":"Kostitsyna, Irina","first_name":"Irina"},{"first_name":"David Jan","last_name":"Liedtke","id":"55557","full_name":"Liedtke, David Jan"},{"first_name":"Christian","id":"20792","full_name":"Scheideler, Christian","last_name":"Scheideler"}],"date_updated":"2026-02-11T08:31:14Z","conference":{"name":"27th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)","start_date":"2025-10-09","end_date":"2025-10-11","location":"Kathmandu"},"doi":"10.1007/978-3-032-11127-2_26","publication_identifier":{"isbn":["9783032111265","9783032111272"],"issn":["0302-9743","1611-3349"]},"publication_status":"published","page":"325-342","citation":{"apa":"Kostitsyna, I., Liedtke, D. J., &#38; Scheideler, C. (2025). Invited Paper: Distributed Rhombus Formation of Sliding Squares. In S. Bonomi, P. S. Mandal, P. Robinson, G. Sharma, &#38; S. Tixeuil (Eds.), <i>Stabilization, Safety, and Security of Distributed Systems</i> (pp. 325–342). Springer Nature Switzerland. <a href=\"https://doi.org/10.1007/978-3-032-11127-2_26\">https://doi.org/10.1007/978-3-032-11127-2_26</a>","mla":"Kostitsyna, Irina, et al. “Invited Paper: Distributed Rhombus Formation of Sliding Squares.” <i>Stabilization, Safety, and Security of Distributed Systems</i>, edited by Silvia Bonomi et al., Springer Nature Switzerland, 2025, pp. 325–42, doi:<a href=\"https://doi.org/10.1007/978-3-032-11127-2_26\">10.1007/978-3-032-11127-2_26</a>.","short":"I. Kostitsyna, D.J. Liedtke, C. Scheideler, in: S. Bonomi, P.S. Mandal, P. Robinson, G. Sharma, S. Tixeuil (Eds.), Stabilization, Safety, and Security of Distributed Systems, Springer Nature Switzerland, Cham, 2025, pp. 325–342.","bibtex":"@inproceedings{Kostitsyna_Liedtke_Scheideler_2025, place={Cham}, title={Invited Paper: Distributed Rhombus Formation of Sliding Squares}, DOI={<a href=\"https://doi.org/10.1007/978-3-032-11127-2_26\">10.1007/978-3-032-11127-2_26</a>}, booktitle={Stabilization, Safety, and Security of Distributed Systems}, publisher={Springer Nature Switzerland}, author={Kostitsyna, Irina and Liedtke, David Jan and Scheideler, Christian}, editor={Bonomi, Silvia and Mandal, Partha Sarathi and Robinson, Peter and Sharma, Gokarna and Tixeuil, Sebastien}, year={2025}, pages={325–342} }","ieee":"I. Kostitsyna, D. J. Liedtke, and C. Scheideler, “Invited Paper: Distributed Rhombus Formation of Sliding Squares,” in <i>Stabilization, Safety, and Security of Distributed Systems</i>, Kathmandu, 2025, pp. 325–342, doi: <a href=\"https://doi.org/10.1007/978-3-032-11127-2_26\">10.1007/978-3-032-11127-2_26</a>.","chicago":"Kostitsyna, Irina, David Jan Liedtke, and Christian Scheideler. “Invited Paper: Distributed Rhombus Formation of Sliding Squares.” In <i>Stabilization, Safety, and Security of Distributed Systems</i>, edited by Silvia Bonomi, Partha Sarathi Mandal, Peter Robinson, Gokarna Sharma, and Sebastien Tixeuil, 325–42. Cham: Springer Nature Switzerland, 2025. <a href=\"https://doi.org/10.1007/978-3-032-11127-2_26\">https://doi.org/10.1007/978-3-032-11127-2_26</a>.","ama":"Kostitsyna I, Liedtke DJ, Scheideler C. Invited Paper: Distributed Rhombus Formation of Sliding Squares. In: Bonomi S, Mandal PS, Robinson P, Sharma G, Tixeuil S, eds. <i>Stabilization, Safety, and Security of Distributed Systems</i>. Springer Nature Switzerland; 2025:325-342. doi:<a href=\"https://doi.org/10.1007/978-3-032-11127-2_26\">10.1007/978-3-032-11127-2_26</a>"},"place":"Cham","language":[{"iso":"eng"}],"publication":"Stabilization, Safety, and Security of Distributed Systems","abstract":[{"text":"The sliding square model is a widely used abstraction for studying self-reconfigurable robotic systems, where modules are square-shaped robots that move by sliding or rotating over one another. In this paper, we propose a novel distributed algorithm that enables a group of modules to reconfigure into a rhombus shape, starting from an arbitrary side-connected configuration. It is connectivity-preserving and operates under minimal assumptions: one leader module, common chirality, constant memory per module, and visibility and communication restricted to immediate neighbors. Unlike prior work, which relaxes the original sliding square move-set, our approach uses the unmodified move-set, addressing the additional challenge of handling locked configurations. Our algorithm is sequential in nature and operates with a worst-case time complexity of O(n^2) rounds, which is optimal for sequential algorithms. To improve runtime, we introduce two parallel variants of the algorithm. Both rely on a spanning tree data structure, allowing modules to make decisions based on local connectivity. Our experimental results show a significant speedup for the first variant, and a linear average runtime for the second variant, which is worst-case optimal for parallel algorithms.","lang":"eng"}],"date_created":"2025-11-23T21:07:12Z","publisher":"Springer Nature Switzerland","title":"Invited Paper: Distributed Rhombus Formation of Sliding Squares","year":"2025"},{"year":"2025","citation":{"ama":"Scheideler C, Padalkin A, Kumar M. Reconfiguration and locomotion with joint movements in the amoebot model. Auton. Robots 49(3): 22 (2025). <i>Reconfiguration and locomotion with joint movements in the amoebot model Auton Robots 49(3): 22 (2025)</i>. Published online 2025.","chicago":"Scheideler, Christian, Andreas Padalkin, and Manish Kumar. “Reconfiguration and Locomotion with Joint Movements in the Amoebot Model. Auton. Robots 49(3): 22 (2025).” <i>Reconfiguration and Locomotion with Joint Movements in the Amoebot Model. Auton. Robots 49(3): 22 (2025)</i>, 2025.","ieee":"C. Scheideler, A. Padalkin, and M. Kumar, “Reconfiguration and locomotion with joint movements in the amoebot model. Auton. Robots 49(3): 22 (2025),” <i>Reconfiguration and locomotion with joint movements in the amoebot model. Auton. Robots 49(3): 22 (2025)</i>, 2025.","short":"C. Scheideler, A. Padalkin, M. Kumar, Reconfiguration and Locomotion with Joint Movements in the Amoebot Model. Auton. Robots 49(3): 22 (2025) (2025).","bibtex":"@article{Scheideler_Padalkin_Kumar_2025, title={Reconfiguration and locomotion with joint movements in the amoebot model. Auton. Robots 49(3): 22 (2025)}, journal={Reconfiguration and locomotion with joint movements in the amoebot model. Auton. Robots 49(3): 22 (2025)}, author={Scheideler, Christian and Padalkin, Andreas and Kumar, Manish}, year={2025} }","mla":"Scheideler, Christian, et al. “Reconfiguration and Locomotion with Joint Movements in the Amoebot Model. Auton. Robots 49(3): 22 (2025).” <i>Reconfiguration and Locomotion with Joint Movements in the Amoebot Model. Auton. Robots 49(3): 22 (2025)</i>, 2025.","apa":"Scheideler, C., Padalkin, A., &#38; Kumar, M. (2025). Reconfiguration and locomotion with joint movements in the amoebot model. Auton. Robots 49(3): 22 (2025). <i>Reconfiguration and Locomotion with Joint Movements in the Amoebot Model. Auton. Robots 49(3): 22 (2025)</i>."},"date_updated":"2026-02-11T09:11:49Z","author":[{"id":"20792","full_name":"Scheideler, Christian","last_name":"Scheideler","first_name":"Christian"},{"id":"88238","full_name":"Padalkin, Andreas","last_name":"Padalkin","first_name":"Andreas"},{"first_name":"Manish","full_name":"Kumar, Manish","last_name":"Kumar"}],"date_created":"2026-02-10T09:41:12Z","title":"Reconfiguration and locomotion with joint movements in the amoebot model. Auton. Robots 49(3): 22 (2025)","publication":"Reconfiguration and locomotion with joint movements in the amoebot model. Auton. Robots 49(3): 22 (2025)","type":"journal_article","status":"public","_id":"64098","department":[{"_id":"34"},{"_id":"7"},{"_id":"79"}],"user_id":"15578","language":[{"iso":"eng"}]},{"date_updated":"2026-02-11T09:11:42Z","author":[{"id":"20792","full_name":"Scheideler, Christian","last_name":"Scheideler","first_name":"Christian"},{"first_name":"Matthias","full_name":"Artmann, Matthias","id":"63743","last_name":"Artmann"},{"first_name":"Tobias ","last_name":"Maurer","full_name":"Maurer, Tobias "},{"full_name":"Padalkin, Andreas","id":"88238","last_name":"Padalkin","first_name":"Andreas"},{"first_name":"Daniel","full_name":"Warner, Daniel","id":"3902","last_name":"Warner"}],"date_created":"2026-02-10T09:01:15Z","title":"AmoebotSim 2.0: A Visual Simulation Environment for the Amoebot Model with Reconfigurable Circuits and Joint Movements (Media Exposition). ","year":"2025","place":"SoCG 2025: 81:1-81:5","citation":{"ama":"Scheideler C, Artmann M, Maurer T, Padalkin A, Warner D. AmoebotSim 2.0: A Visual Simulation Environment for the Amoebot Model with Reconfigurable Circuits and Joint Movements (Media Exposition). . In: ; 2025.","ieee":"C. Scheideler, M. Artmann, T. Maurer, A. Padalkin, and D. Warner, “AmoebotSim 2.0: A Visual Simulation Environment for the Amoebot Model with Reconfigurable Circuits and Joint Movements (Media Exposition). ,” 2025.","chicago":"Scheideler, Christian, Matthias Artmann, Tobias  Maurer, Andreas Padalkin, and Daniel Warner. “AmoebotSim 2.0: A Visual Simulation Environment for the Amoebot Model with Reconfigurable Circuits and Joint Movements (Media Exposition). .” SoCG 2025: 81:1-81:5, 2025.","mla":"Scheideler, Christian, et al. <i>AmoebotSim 2.0: A Visual Simulation Environment for the Amoebot Model with Reconfigurable Circuits and Joint Movements (Media Exposition). </i>. 2025.","short":"C. Scheideler, M. Artmann, T. Maurer, A. Padalkin, D. Warner, in: SoCG 2025: 81:1-81:5, 2025.","bibtex":"@inproceedings{Scheideler_Artmann_Maurer_Padalkin_Warner_2025, place={SoCG 2025: 81:1-81:5}, title={AmoebotSim 2.0: A Visual Simulation Environment for the Amoebot Model with Reconfigurable Circuits and Joint Movements (Media Exposition). }, author={Scheideler, Christian and Artmann, Matthias and Maurer, Tobias  and Padalkin, Andreas and Warner, Daniel}, year={2025} }","apa":"Scheideler, C., Artmann, M., Maurer, T., Padalkin, A., &#38; Warner, D. (2025). <i>AmoebotSim 2.0: A Visual Simulation Environment for the Amoebot Model with Reconfigurable Circuits and Joint Movements (Media Exposition). </i>."},"_id":"64094","user_id":"15578","department":[{"_id":"34"},{"_id":"7"},{"_id":"79"}],"language":[{"iso":"eng"}],"type":"conference","status":"public"},{"year":"2025","place":"ITCS 2025: 45:1-45:26","citation":{"mla":"Scheideler, Christian, et al. <i>Distributed and Parallel Low-Diameter Decompositions for Arbitrary and Restricted Graphs. </i>. 2025.","short":"C. Scheideler, J. Dou, T. Götte, H. Hillebrandt, J. Werthmann, in: ITCS 2025: 45:1-45:26, 2025.","bibtex":"@inproceedings{Scheideler_Dou_Götte_Hillebrandt_Werthmann_2025, place={ITCS 2025: 45:1-45:26}, title={Distributed and Parallel Low-Diameter Decompositions for Arbitrary and Restricted Graphs. }, author={Scheideler, Christian and Dou, Jinfeng and Götte, Thorsten  and Hillebrandt, Henning and Werthmann, Julian}, year={2025} }","apa":"Scheideler, C., Dou, J., Götte, T., Hillebrandt, H., &#38; Werthmann, J. (2025). <i>Distributed and Parallel Low-Diameter Decompositions for Arbitrary and Restricted Graphs. </i>.","ama":"Scheideler C, Dou J, Götte T, Hillebrandt H, Werthmann J. Distributed and Parallel Low-Diameter Decompositions for Arbitrary and Restricted Graphs. . In: ; 2025.","ieee":"C. Scheideler, J. Dou, T. Götte, H. Hillebrandt, and J. Werthmann, “Distributed and Parallel Low-Diameter Decompositions for Arbitrary and Restricted Graphs. ,” 2025.","chicago":"Scheideler, Christian, Jinfeng Dou, Thorsten  Götte, Henning Hillebrandt, and Julian Werthmann. “Distributed and Parallel Low-Diameter Decompositions for Arbitrary and Restricted Graphs. .” ITCS 2025: 45:1-45:26, 2025."},"date_updated":"2026-02-11T09:11:29Z","author":[{"last_name":"Scheideler","id":"20792","full_name":"Scheideler, Christian","first_name":"Christian"},{"first_name":"Jinfeng","last_name":"Dou","full_name":"Dou, Jinfeng","id":"92888"},{"first_name":"Thorsten ","full_name":"Götte, Thorsten ","last_name":"Götte"},{"id":"74425","full_name":"Hillebrandt, Henning","last_name":"Hillebrandt","first_name":"Henning"},{"full_name":"Werthmann, Julian","id":"50024","last_name":"Werthmann","first_name":"Julian"}],"date_created":"2026-02-10T09:10:14Z","title":"Distributed and Parallel Low-Diameter Decompositions for Arbitrary and Restricted Graphs. ","type":"conference","status":"public","_id":"64096","user_id":"15578","department":[{"_id":"34"},{"_id":"7"},{"_id":"79"}],"language":[{"iso":"eng"}]},{"type":"book_editor","status":"public","editor":[{"first_name":"Christian","last_name":"Scheideler","full_name":"Scheideler, Christian","id":"20792"},{"full_name":"Meeks, Kitty","last_name":"Meeks","first_name":"Kitty"}],"department":[{"_id":"34"},{"_id":"7"},{"_id":"79"}],"user_id":"15578","_id":"64099","language":[{"iso":"eng"}],"publication_identifier":{"unknown":["ISBN 978-3-95977-368-3"]},"citation":{"apa":"Scheideler, C., &#38; Meeks, K. (Eds.). (2025). <i>4th Symposium on Algorithmic Foundations of Dynamic Networks.</i>","mla":"Scheideler, Christian, and Kitty Meeks, editors. <i>4th Symposium on Algorithmic Foundations of Dynamic Networks.</i> 2025.","short":"C. Scheideler, K. Meeks, eds., 4th Symposium on Algorithmic Foundations of Dynamic Networks., SAND 2025, Liverpool, UK, June 9-11, 2025. LIPIcs 330, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2025.","bibtex":"@book{Scheideler_Meeks_2025, place={SAND 2025, Liverpool, UK, June 9-11, 2025. LIPIcs 330, Schloss Dagstuhl - Leibniz-Zentrum für Informatik}, title={4th Symposium on Algorithmic Foundations of Dynamic Networks.}, year={2025} }","ama":"Scheideler C, Meeks K, eds. <i>4th Symposium on Algorithmic Foundations of Dynamic Networks.</i>; 2025.","chicago":"Scheideler, Christian, and Kitty Meeks, eds. <i>4th Symposium on Algorithmic Foundations of Dynamic Networks.</i> SAND 2025, Liverpool, UK, June 9-11, 2025. LIPIcs 330, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2025.","ieee":"C. Scheideler and K. Meeks, Eds., <i>4th Symposium on Algorithmic Foundations of Dynamic Networks.</i> SAND 2025, Liverpool, UK, June 9-11, 2025. LIPIcs 330, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2025."},"place":"SAND 2025, Liverpool, UK, June 9-11, 2025. LIPIcs 330, Schloss Dagstuhl - Leibniz-Zentrum für Informatik","year":"2025","date_created":"2026-02-10T09:49:03Z","date_updated":"2026-02-11T09:11:09Z","title":"4th Symposium on Algorithmic Foundations of Dynamic Networks."},{"type":"conference","status":"public","department":[{"_id":"34"},{"_id":"7"},{"_id":"79"}],"user_id":"15578","_id":"64097","language":[{"iso":"eng"}],"citation":{"bibtex":"@inproceedings{Scheideler_Artmann_Padalkin_2025, place={DISC 2025: 7:1-7:22}, title={On the Shape Containment Problem Within the Amoebot Model with Reconfigurable Circuits. }, author={Scheideler, Christian and Artmann, Matthias and Padalkin, Andreas}, year={2025} }","mla":"Scheideler, Christian, et al. <i>On the Shape Containment Problem Within the Amoebot Model with Reconfigurable Circuits. </i>. 2025.","short":"C. Scheideler, M. Artmann, A. Padalkin, in: DISC 2025: 7:1-7:22, 2025.","apa":"Scheideler, C., Artmann, M., &#38; Padalkin, A. (2025). <i>On the Shape Containment Problem Within the Amoebot Model with Reconfigurable Circuits. </i>.","ama":"Scheideler C, Artmann M, Padalkin A. On the Shape Containment Problem Within the Amoebot Model with Reconfigurable Circuits. . In: ; 2025.","ieee":"C. Scheideler, M. Artmann, and A. Padalkin, “On the Shape Containment Problem Within the Amoebot Model with Reconfigurable Circuits. ,” 2025.","chicago":"Scheideler, Christian, Matthias Artmann, and Andreas Padalkin. “On the Shape Containment Problem Within the Amoebot Model with Reconfigurable Circuits. .” DISC 2025: 7:1-7:22, 2025."},"place":"DISC 2025: 7:1-7:22","year":"2025","date_created":"2026-02-10T09:17:54Z","author":[{"first_name":"Christian","last_name":"Scheideler","full_name":"Scheideler, Christian","id":"20792"},{"first_name":"Matthias","id":"63743","full_name":"Artmann, Matthias","last_name":"Artmann"},{"first_name":"Andreas","last_name":"Padalkin","id":"88238","full_name":"Padalkin, Andreas"}],"date_updated":"2026-02-11T09:11:19Z","title":"On the Shape Containment Problem Within the Amoebot Model with Reconfigurable Circuits. "},{"_id":"64095","user_id":"15578","department":[{"_id":"34"},{"_id":"7"},{"_id":"79"}],"language":[{"iso":"eng"}],"type":"conference","status":"public","date_updated":"2026-02-11T09:11:35Z","author":[{"first_name":"Christian","last_name":"Scheideler","id":"20792","full_name":"Scheideler, Christian"},{"first_name":"John ","last_name":"Augustine ","full_name":"Augustine , John "},{"first_name":"Julian","full_name":"Werthmann, Julian","id":"50024","last_name":"Werthmann"}],"date_created":"2026-02-10T09:04:56Z","title":"Supervised Distributed Computing. ","year":"2025","place":"Euro-Par (3) 2025: 48-62","citation":{"ieee":"C. Scheideler, J. Augustine , and J. Werthmann, “Supervised Distributed Computing. ,” 2025.","chicago":"Scheideler, Christian, John  Augustine , and Julian Werthmann. “Supervised Distributed Computing. .” Euro-Par (3) 2025: 48-62, 2025.","ama":"Scheideler C, Augustine  J, Werthmann J. Supervised Distributed Computing. . In: ; 2025.","bibtex":"@inproceedings{Scheideler_Augustine _Werthmann_2025, place={Euro-Par (3) 2025: 48-62}, title={Supervised Distributed Computing. }, author={Scheideler, Christian and Augustine , John  and Werthmann, Julian}, year={2025} }","mla":"Scheideler, Christian, et al. <i>Supervised Distributed Computing. </i>. 2025.","short":"C. Scheideler, J. Augustine , J. Werthmann, in: Euro-Par (3) 2025: 48-62, 2025.","apa":"Scheideler, C., Augustine , J., &#38; Werthmann, J. (2025). <i>Supervised Distributed Computing. </i>."}},{"type":"conference","publication":"2025 55th Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops (DSN-W)","status":"public","_id":"64112","user_id":"64665","department":[{"_id":"78"}],"publication_status":"published","year":"2025","citation":{"ieee":"F. Jalil, M. Awais, Q. A. Ahmed, H. G. Mohammadi, T. Jungeblut, and M. Platzner, “Deep&#38;amp;Wide: Achieving Area Efficiency in Scalable Approximate Accelerators,” 2025, doi: <a href=\"https://doi.org/10.1109/dsn-w65791.2025.00048\">10.1109/dsn-w65791.2025.00048</a>.","chicago":"Jalil, Farjana, Muhammad Awais, Qazi Arbab Ahmed, Hassan Ghasemzadeh Mohammadi, Thorsten Jungeblut, and Marco Platzner. “Deep&#38;amp;Wide: Achieving Area Efficiency in Scalable Approximate Accelerators.” In <i>2025 55th Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops (DSN-W)</i>. IEEE, 2025. <a href=\"https://doi.org/10.1109/dsn-w65791.2025.00048\">https://doi.org/10.1109/dsn-w65791.2025.00048</a>.","ama":"Jalil F, Awais M, Ahmed QA, Mohammadi HG, Jungeblut T, Platzner M. Deep&#38;amp;Wide: Achieving Area Efficiency in Scalable Approximate Accelerators. In: <i>2025 55th Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops (DSN-W)</i>. IEEE; 2025. doi:<a href=\"https://doi.org/10.1109/dsn-w65791.2025.00048\">10.1109/dsn-w65791.2025.00048</a>","apa":"Jalil, F., Awais, M., Ahmed, Q. A., Mohammadi, H. G., Jungeblut, T., &#38; Platzner, M. (2025). Deep&#38;amp;Wide: Achieving Area Efficiency in Scalable Approximate Accelerators. <i>2025 55th Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops (DSN-W)</i>. <a href=\"https://doi.org/10.1109/dsn-w65791.2025.00048\">https://doi.org/10.1109/dsn-w65791.2025.00048</a>","short":"F. Jalil, M. Awais, Q.A. Ahmed, H.G. Mohammadi, T. Jungeblut, M. Platzner, in: 2025 55th Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops (DSN-W), IEEE, 2025.","mla":"Jalil, Farjana, et al. “Deep&#38;amp;Wide: Achieving Area Efficiency in Scalable Approximate Accelerators.” <i>2025 55th Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops (DSN-W)</i>, IEEE, 2025, doi:<a href=\"https://doi.org/10.1109/dsn-w65791.2025.00048\">10.1109/dsn-w65791.2025.00048</a>.","bibtex":"@inproceedings{Jalil_Awais_Ahmed_Mohammadi_Jungeblut_Platzner_2025, title={Deep&#38;amp;Wide: Achieving Area Efficiency in Scalable Approximate Accelerators}, DOI={<a href=\"https://doi.org/10.1109/dsn-w65791.2025.00048\">10.1109/dsn-w65791.2025.00048</a>}, booktitle={2025 55th Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops (DSN-W)}, publisher={IEEE}, author={Jalil, Farjana and Awais, Muhammad and Ahmed, Qazi Arbab and Mohammadi, Hassan Ghasemzadeh and Jungeblut, Thorsten and Platzner, Marco}, year={2025} }"},"date_updated":"2026-02-11T10:20:30Z","publisher":"IEEE","date_created":"2026-02-11T10:18:50Z","author":[{"last_name":"Jalil","full_name":"Jalil, Farjana","first_name":"Farjana"},{"full_name":"Awais, Muhammad","last_name":"Awais","first_name":"Muhammad"},{"full_name":"Ahmed, Qazi Arbab","last_name":"Ahmed","first_name":"Qazi Arbab"},{"last_name":"Mohammadi","full_name":"Mohammadi, Hassan Ghasemzadeh","first_name":"Hassan Ghasemzadeh"},{"first_name":"Thorsten","last_name":"Jungeblut","full_name":"Jungeblut, Thorsten"},{"full_name":"Platzner, Marco","last_name":"Platzner","first_name":"Marco"}],"title":"Deep&amp;Wide: Achieving Area Efficiency in Scalable Approximate Accelerators","doi":"10.1109/dsn-w65791.2025.00048"},{"_id":"64113","user_id":"64665","department":[{"_id":"78"}],"status":"public","type":"conference","publication":"2025 IEEE 28th International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS)","title":"A Two-Stage Approximation Methodology for Efficient DNN Hardware Implementation","doi":"10.1109/ddecs63720.2025.11006769","publisher":"IEEE","date_updated":"2026-02-11T10:20:31Z","date_created":"2026-02-11T10:19:16Z","author":[{"full_name":"Hadipour, Amir Hossein","last_name":"Hadipour","first_name":"Amir Hossein"},{"last_name":"Jafari","full_name":"Jafari, Atousa","first_name":"Atousa"},{"last_name":"Awais","full_name":"Awais, Muhammad","first_name":"Muhammad"},{"full_name":"Platzner, Marco","last_name":"Platzner","first_name":"Marco"}],"year":"2025","citation":{"mla":"Hadipour, Amir Hossein, et al. “A Two-Stage Approximation Methodology for Efficient DNN Hardware Implementation.” <i>2025 IEEE 28th International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS)</i>, IEEE, 2025, doi:<a href=\"https://doi.org/10.1109/ddecs63720.2025.11006769\">10.1109/ddecs63720.2025.11006769</a>.","bibtex":"@inproceedings{Hadipour_Jafari_Awais_Platzner_2025, title={A Two-Stage Approximation Methodology for Efficient DNN Hardware Implementation}, DOI={<a href=\"https://doi.org/10.1109/ddecs63720.2025.11006769\">10.1109/ddecs63720.2025.11006769</a>}, booktitle={2025 IEEE 28th International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS)}, publisher={IEEE}, author={Hadipour, Amir Hossein and Jafari, Atousa and Awais, Muhammad and Platzner, Marco}, year={2025} }","short":"A.H. Hadipour, A. Jafari, M. Awais, M. Platzner, in: 2025 IEEE 28th International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS), IEEE, 2025.","apa":"Hadipour, A. H., Jafari, A., Awais, M., &#38; Platzner, M. (2025). A Two-Stage Approximation Methodology for Efficient DNN Hardware Implementation. <i>2025 IEEE 28th International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS)</i>. <a href=\"https://doi.org/10.1109/ddecs63720.2025.11006769\">https://doi.org/10.1109/ddecs63720.2025.11006769</a>","ama":"Hadipour AH, Jafari A, Awais M, Platzner M. A Two-Stage Approximation Methodology for Efficient DNN Hardware Implementation. In: <i>2025 IEEE 28th International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS)</i>. IEEE; 2025. doi:<a href=\"https://doi.org/10.1109/ddecs63720.2025.11006769\">10.1109/ddecs63720.2025.11006769</a>","ieee":"A. H. Hadipour, A. Jafari, M. Awais, and M. Platzner, “A Two-Stage Approximation Methodology for Efficient DNN Hardware Implementation,” 2025, doi: <a href=\"https://doi.org/10.1109/ddecs63720.2025.11006769\">10.1109/ddecs63720.2025.11006769</a>.","chicago":"Hadipour, Amir Hossein, Atousa Jafari, Muhammad Awais, and Marco Platzner. “A Two-Stage Approximation Methodology for Efficient DNN Hardware Implementation.” In <i>2025 IEEE 28th International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS)</i>. IEEE, 2025. <a href=\"https://doi.org/10.1109/ddecs63720.2025.11006769\">https://doi.org/10.1109/ddecs63720.2025.11006769</a>."},"publication_status":"published"},{"oa":"1","date_updated":"2026-02-12T10:45:36Z","volume":36,"author":[{"full_name":"Butzhammer, Lorenz","last_name":"Butzhammer","first_name":"Lorenz"},{"first_name":"Niklas","last_name":"Handke","full_name":"Handke, Niklas"},{"first_name":"Simon","last_name":"Wittl","full_name":"Wittl, Simon"},{"full_name":"Herl, Gabriel","last_name":"Herl","first_name":"Gabriel"},{"first_name":"Tino","full_name":"Hausotte, Tino","last_name":"Hausotte"}],"doi":"10.1088/1361-6501/ada05a","main_file_link":[{"url":"https://iopscience.iop.org/article/10.1088/1361-6501/ada05a/pdf","open_access":"1"}],"publication_identifier":{"issn":["0957-0233","1361-6501"]},"publication_status":"published","intvolume":"        36","citation":{"apa":"Butzhammer, L., Handke, N., Wittl, S., Herl, G., &#38; Hausotte, T. (2025). Direct assessment of the influence of pose repeatability on the accuracy of dimensional measurements for computed tomography systems with high degrees of freedom. <i>Measurement Science and Technology</i>, <i>36</i>(2), Article 025401. <a href=\"https://doi.org/10.1088/1361-6501/ada05a\">https://doi.org/10.1088/1361-6501/ada05a</a>","mla":"Butzhammer, Lorenz, et al. “Direct Assessment of the Influence of Pose Repeatability on the Accuracy of Dimensional Measurements for Computed Tomography Systems with High Degrees of Freedom.” <i>Measurement Science and Technology</i>, vol. 36, no. 2, 025401, IOP Publishing, 2025, doi:<a href=\"https://doi.org/10.1088/1361-6501/ada05a\">10.1088/1361-6501/ada05a</a>.","short":"L. Butzhammer, N. Handke, S. Wittl, G. Herl, T. Hausotte, Measurement Science and Technology 36 (2025).","bibtex":"@article{Butzhammer_Handke_Wittl_Herl_Hausotte_2025, title={Direct assessment of the influence of pose repeatability on the accuracy of dimensional measurements for computed tomography systems with high degrees of freedom}, volume={36}, DOI={<a href=\"https://doi.org/10.1088/1361-6501/ada05a\">10.1088/1361-6501/ada05a</a>}, number={2025401}, journal={Measurement Science and Technology}, publisher={IOP Publishing}, author={Butzhammer, Lorenz and Handke, Niklas and Wittl, Simon and Herl, Gabriel and Hausotte, Tino}, year={2025} }","ama":"Butzhammer L, Handke N, Wittl S, Herl G, Hausotte T. Direct assessment of the influence of pose repeatability on the accuracy of dimensional measurements for computed tomography systems with high degrees of freedom. <i>Measurement Science and Technology</i>. 2025;36(2). doi:<a href=\"https://doi.org/10.1088/1361-6501/ada05a\">10.1088/1361-6501/ada05a</a>","ieee":"L. Butzhammer, N. Handke, S. Wittl, G. Herl, and T. Hausotte, “Direct assessment of the influence of pose repeatability on the accuracy of dimensional measurements for computed tomography systems with high degrees of freedom,” <i>Measurement Science and Technology</i>, vol. 36, no. 2, Art. no. 025401, 2025, doi: <a href=\"https://doi.org/10.1088/1361-6501/ada05a\">10.1088/1361-6501/ada05a</a>.","chicago":"Butzhammer, Lorenz, Niklas Handke, Simon Wittl, Gabriel Herl, and Tino Hausotte. “Direct Assessment of the Influence of Pose Repeatability on the Accuracy of Dimensional Measurements for Computed Tomography Systems with High Degrees of Freedom.” <i>Measurement Science and Technology</i> 36, no. 2 (2025). <a href=\"https://doi.org/10.1088/1361-6501/ada05a\">https://doi.org/10.1088/1361-6501/ada05a</a>."},"_id":"61825","project":[{"name":"TRR 285:  Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten","_id":"130"},{"_id":"133","name":"TRR 285 - Project Area C"},{"name":"TRR 285 - Subproject C05","_id":"149"}],"department":[{"_id":"630"}],"user_id":"93720","article_number":"025401","type":"journal_article","status":"public","publisher":"IOP Publishing","date_created":"2025-10-14T13:50:32Z","title":"Direct assessment of the influence of pose repeatability on the accuracy of dimensional measurements for computed tomography systems with high degrees of freedom","quality_controlled":"1","issue":"2","year":"2025","language":[{"iso":"eng"}],"publication":"Measurement Science and Technology","abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>Industrial x-ray computed tomography (CT) systems with high geometric flexibility are increasingly utilized for large-scale measurement objects or challenging measurement tasks. To maintain high accuracy when deviating from the established circular scan trajectory, trajectory calibration methods using multi-sphere reference objects with known marker positions are commonly employed. These multi-sphere objects can either be scanned together with the measurement object (online trajectory calibration) or in a separate scan (offline trajectory calibration). While offline calibration increases machine time, it generally results in higher scan quality. However, a sufficient pose repeatability is necessary to ensure comparable or even superior accuracy to online calibration. In this contribution, we present a straightforward procedure to compare both types of trajectory calibration in a way that the differences of the results can directly be traced back to the influence of the pose repeatability. The multi-sphere reference object is not only used for trajectory calibration, but simultaneously as a measurement object for repeated measurements. The methodology is tested on both a twin robotic CT system and a conventional CT system that is additionally equipped with a hexapod manipulator for adaptive object tilting. Results showed, independent from the type of trajectory calibration, systematic measurement errors in the order of 10<jats:sup>−5</jats:sup>–10<jats:sup>−4</jats:sup> of measured sphere distances and sphericity values below 50 <jats:inline-formula>\r\n                     <jats:tex-math/>\r\n                     <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\">\r\n                        <mml:mrow>\r\n                           <mml:mrow>\r\n                              <mml:mtext>μ</mml:mtext>\r\n                           </mml:mrow>\r\n                           <mml:mrow>\r\n                              <mml:mi mathvariant=\"normal\">m</mml:mi>\r\n                           </mml:mrow>\r\n                        </mml:mrow>\r\n                     </mml:math>\r\n                  </jats:inline-formula>. For sphere distances, random errors were increased by a factor of 5 due to the offline trajectory calibration, but were still low (<jats:inline-formula>\r\n                     <jats:tex-math/>\r\n                     <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\">\r\n                        <mml:mrow>\r\n                           <mml:mrow>\r\n                              <mml:mo>&lt;</mml:mo>\r\n                           </mml:mrow>\r\n                           <mml:mrow>\r\n                              <mml:mn>1</mml:mn>\r\n                           </mml:mrow>\r\n                           <mml:mstyle scriptlevel=\"0\"/>\r\n                           <mml:mrow>\r\n                              <mml:mtext>μ</mml:mtext>\r\n                           </mml:mrow>\r\n                           <mml:mrow>\r\n                              <mml:mi mathvariant=\"normal\">m</mml:mi>\r\n                           </mml:mrow>\r\n                        </mml:mrow>\r\n                     </mml:math>\r\n                  </jats:inline-formula>) in comparison to systematic errors and the spread of different measurement features. Overall, both investigated systems demonstrated sufficient positioning repeatability for offline trajectory calibration. The method is in general also applicable to any other types of manipulator systems used for CT devices. It provides a workflow for the decision which type of trajectory calibration is preferable for a given CT system.</jats:p>","lang":"eng"}]}]