--- _id: '43194' abstract: - lang: eng text: For incident light polarized perpendicular to the tube axis the multi-band semiconductor Bloch equations (MB-SBEs) that involve various screened interband Coulomb interactions (ICIs) are derived. The calculated E 12 peak is very close to the longitudinal excitonic peak E 22. Compared with the previous theoretical peak positions, the blue-shift of the peak in our results is about 0.5 eV. Then, subsequent detailed analyses show that the screening effect on the diagonal ICIs (D-ICIs) plays a key role in this big blue-shift. The valley-degenerate transverse pair excitations holding the same selection rule further enhance the screening effect on D-ICIs. Specially at q = 0 the dielectric function acting on the D-ICIs enhances two times. In our calculation the strong screening effect contributes 90% of the big blue-shift, while the non-diagonal ICIs (ND-ICIs) contribute to 10% of the blue-shift. article_number: '230' author: - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 - first_name: Hong full_name: Liu, Hong last_name: Liu citation: ama: Meier T, Liu H. Influence of strong screening effect on the perpendicular polarized linear excitonic absorption spectra of semiconducting carbon nanotubes. The European Physical Journal B. 2016;89. doi:10.1140/epjb/e2016-70476-8 apa: Meier, T., & Liu, H. (2016). Influence of strong screening effect on the perpendicular polarized linear excitonic absorption spectra of semiconducting carbon nanotubes. The European Physical Journal B, 89, Article 230. https://doi.org/10.1140/epjb/e2016-70476-8 bibtex: '@article{Meier_Liu_2016, title={Influence of strong screening effect on the perpendicular polarized linear excitonic absorption spectra of semiconducting carbon nanotubes}, volume={89}, DOI={10.1140/epjb/e2016-70476-8}, number={230}, journal={The European Physical Journal B}, author={Meier, Torsten and Liu, Hong}, year={2016} }' chicago: Meier, Torsten, and Hong Liu. “Influence of Strong Screening Effect on the Perpendicular Polarized Linear Excitonic Absorption Spectra of Semiconducting Carbon Nanotubes.” The European Physical Journal B 89 (2016). https://doi.org/10.1140/epjb/e2016-70476-8. ieee: 'T. Meier and H. Liu, “Influence of strong screening effect on the perpendicular polarized linear excitonic absorption spectra of semiconducting carbon nanotubes,” The European Physical Journal B, vol. 89, Art. no. 230, 2016, doi: 10.1140/epjb/e2016-70476-8.' mla: Meier, Torsten, and Hong Liu. “Influence of Strong Screening Effect on the Perpendicular Polarized Linear Excitonic Absorption Spectra of Semiconducting Carbon Nanotubes.” The European Physical Journal B, vol. 89, 230, 2016, doi:10.1140/epjb/e2016-70476-8. short: T. Meier, H. Liu, The European Physical Journal B 89 (2016). date_created: 2023-03-29T20:50:00Z date_updated: 2023-03-29T20:58:34Z department: - _id: '293' doi: 10.1140/epjb/e2016-70476-8 intvolume: ' 89' language: - iso: eng publication: The European Physical Journal B publication_status: published status: public title: Influence of strong screening effect on the perpendicular polarized linear excitonic absorption spectra of semiconducting carbon nanotubes type: journal_article user_id: '49063' volume: 89 year: '2016' ... --- _id: '13917' abstract: - lang: eng text: We present the synthesis of indium oxide (In2O3) inverse opal films with photonic stop bands in the visible range by a structure replication method. Artificial opal films made of poly(methyl methacrylate) (PMMA) spheres are utilized as template. The opal films are deposited via sedimentation facilitated by ultrasonication, and then impregnated by indium nitrate solution, which is thermally converted to In2O3 after drying. The quality of the resulting inverse opal film depends on many parameters; in this study the water content of the indium nitrate/PMMA composite after drying is investigated. Comparison of the reflectance spectra recorded by vis-spectroscopy with simulated data shows a good agreement between the peak position and calculated stop band positions for the inverse opals. This synthesis is less complex and highly efficient compared to most other techniques and is suitable for use in many applications. author: - first_name: Sabrina full_name: Amrehn, Sabrina last_name: Amrehn - first_name: Daniel full_name: Berghoff, Daniel id: '38175' last_name: Berghoff - first_name: Andreas full_name: Nikitin, Andreas last_name: Nikitin - first_name: Matthias full_name: Reichelt, Matthias id: '138' last_name: Reichelt - first_name: Xia full_name: Wu, Xia last_name: Wu - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 - first_name: Thorsten full_name: Wagner, Thorsten last_name: Wagner citation: ama: Amrehn S, Berghoff D, Nikitin A, et al. Indium oxide inverse opal films synthesized by structure replication method. Photonics and Nanostructures - Fundamentals and Applications. 2016;19:55-63. doi:10.1016/j.photonics.2016.02.005 apa: Amrehn, S., Berghoff, D., Nikitin, A., Reichelt, M., Wu, X., Meier, T., & Wagner, T. (2016). Indium oxide inverse opal films synthesized by structure replication method. Photonics and Nanostructures - Fundamentals and Applications, 19, 55–63. https://doi.org/10.1016/j.photonics.2016.02.005 bibtex: '@article{Amrehn_Berghoff_Nikitin_Reichelt_Wu_Meier_Wagner_2016, title={Indium oxide inverse opal films synthesized by structure replication method}, volume={19}, DOI={10.1016/j.photonics.2016.02.005}, journal={Photonics and Nanostructures - Fundamentals and Applications}, author={Amrehn, Sabrina and Berghoff, Daniel and Nikitin, Andreas and Reichelt, Matthias and Wu, Xia and Meier, Torsten and Wagner, Thorsten}, year={2016}, pages={55–63} }' chicago: 'Amrehn, Sabrina, Daniel Berghoff, Andreas Nikitin, Matthias Reichelt, Xia Wu, Torsten Meier, and Thorsten Wagner. “Indium Oxide Inverse Opal Films Synthesized by Structure Replication Method.” Photonics and Nanostructures - Fundamentals and Applications 19 (2016): 55–63. https://doi.org/10.1016/j.photonics.2016.02.005.' ieee: 'S. Amrehn et al., “Indium oxide inverse opal films synthesized by structure replication method,” Photonics and Nanostructures - Fundamentals and Applications, vol. 19, pp. 55–63, 2016, doi: 10.1016/j.photonics.2016.02.005.' mla: Amrehn, Sabrina, et al. “Indium Oxide Inverse Opal Films Synthesized by Structure Replication Method.” Photonics and Nanostructures - Fundamentals and Applications, vol. 19, 2016, pp. 55–63, doi:10.1016/j.photonics.2016.02.005. short: S. Amrehn, D. Berghoff, A. Nikitin, M. Reichelt, X. Wu, T. Meier, T. Wagner, Photonics and Nanostructures - Fundamentals and Applications 19 (2016) 55–63. date_created: 2019-10-18T08:31:34Z date_updated: 2023-04-16T21:20:25Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '2' - _id: '308' - _id: '230' doi: 10.1016/j.photonics.2016.02.005 funded_apc: '1' intvolume: ' 19' language: - iso: eng page: 55-63 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Photonics and Nanostructures - Fundamentals and Applications publication_identifier: issn: - 1569-4410 publication_status: published status: public title: Indium oxide inverse opal films synthesized by structure replication method type: journal_article user_id: '49063' volume: 19 year: '2016' ... --- _id: '13915' abstract: - lang: eng text: "The dynamics of a pair of harmonic oscillators represented by three-dimensional fields coupled with a repulsive cubic nonlinearity is investigated through direct simulations of the respective field equations and with the help of the finite-mode Galerkin approximation (GA), which represents the two interacting fields by a superposition of \r\n3+3 harmonic-oscillator p-wave eigenfunctions with orbital and magnetic quantum numbers l=1 and m=1, 0, −1. The system can be implemented in binary Bose-Einstein condensates, demonstrating the potential of the atomic condensates to emulate various complex modes predicted by classical field theories. First, the GA very accurately predicts a broadly degenerate set of the system's ground states in the p-wave manifold, in the form of complexes built of a dipole coaxial with another dipole or vortex, as well as complexes built of mutually orthogonal dipoles. Next, pairs of noncoaxial vortices and/or dipoles, including pairs of mutually perpendicular vortices, develop remarkably stable dynamical regimes, which feature periodic exchange of the angular momentum and periodic switching between dipoles and vortices. For a moderately strong nonlinearity, simulations of the coupled-field equations agree very well with results produced by the GA, demonstrating that the dynamics is accurately spanned by the set of six modes limited to l=1." author: - first_name: R. full_name: Driben, R. last_name: Driben - first_name: V. V. full_name: Konotop, V. V. last_name: Konotop - first_name: B. A. full_name: Malomed, B. A. last_name: Malomed - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 citation: ama: Driben R, Konotop VV, Malomed BA, Meier T. Dynamics of dipoles and vortices in nonlinearly coupled three-dimensional field oscillators. Physical Review E. 2016;94(1). doi:10.1103/physreve.94.012207 apa: Driben, R., Konotop, V. V., Malomed, B. A., & Meier, T. (2016). Dynamics of dipoles and vortices in nonlinearly coupled three-dimensional field oscillators. Physical Review E, 94(1). https://doi.org/10.1103/physreve.94.012207 bibtex: '@article{Driben_Konotop_Malomed_Meier_2016, title={Dynamics of dipoles and vortices in nonlinearly coupled three-dimensional field oscillators}, volume={94}, DOI={10.1103/physreve.94.012207}, number={1}, journal={Physical Review E}, author={Driben, R. and Konotop, V. V. and Malomed, B. A. and Meier, Torsten}, year={2016} }' chicago: Driben, R., V. V. Konotop, B. A. Malomed, and Torsten Meier. “Dynamics of Dipoles and Vortices in Nonlinearly Coupled Three-Dimensional Field Oscillators.” Physical Review E 94, no. 1 (2016). https://doi.org/10.1103/physreve.94.012207. ieee: 'R. Driben, V. V. Konotop, B. A. Malomed, and T. Meier, “Dynamics of dipoles and vortices in nonlinearly coupled three-dimensional field oscillators,” Physical Review E, vol. 94, no. 1, 2016, doi: 10.1103/physreve.94.012207.' mla: Driben, R., et al. “Dynamics of Dipoles and Vortices in Nonlinearly Coupled Three-Dimensional Field Oscillators.” Physical Review E, vol. 94, no. 1, 2016, doi:10.1103/physreve.94.012207. short: R. Driben, V.V. Konotop, B.A. Malomed, T. Meier, Physical Review E 94 (2016). date_created: 2019-10-18T08:29:20Z date_updated: 2023-04-16T21:19:43Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '230' doi: 10.1103/physreve.94.012207 funded_apc: '1' intvolume: ' 94' issue: '1' language: - iso: eng publication: Physical Review E publication_identifier: issn: - 2470-0045 - 2470-0053 publication_status: published status: public title: Dynamics of dipoles and vortices in nonlinearly coupled three-dimensional field oscillators type: journal_article user_id: '49063' volume: 94 year: '2016' ... --- _id: '13918' article_number: 97460W author: - first_name: Reinold full_name: Podzimski, Reinold last_name: Podzimski - first_name: Huynh Thanh full_name: Duc, Huynh Thanh last_name: Duc - first_name: Shekhar full_name: Priyadarshi, Shekhar last_name: Priyadarshi - first_name: Christian full_name: Schmidt, Christian last_name: Schmidt - first_name: Mark full_name: Bieler, Mark last_name: Bieler - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 citation: ama: 'Podzimski R, Duc HT, Priyadarshi S, Schmidt C, Bieler M, Meier T. Photocurrents in semiconductors and semiconductor quantum wells analyzed by k.p-based Bloch equations. In: Betz M, Elezzabi AY, eds. Ultrafast Phenomena and Nanophotonics XX. Vol 9746. SPIE Proceedings. SPIE; 2016. doi:10.1117/12.2208572' apa: Podzimski, R., Duc, H. T., Priyadarshi, S., Schmidt, C., Bieler, M., & Meier, T. (2016). Photocurrents in semiconductors and semiconductor quantum wells analyzed by k.p-based Bloch equations. In M. Betz & A. Y. Elezzabi (Eds.), Ultrafast Phenomena and Nanophotonics XX (No. 97460W; Vol. 9746). SPIE. https://doi.org/10.1117/12.2208572 bibtex: '@inproceedings{Podzimski_Duc_Priyadarshi_Schmidt_Bieler_Meier_2016, series={SPIE Proceedings}, title={Photocurrents in semiconductors and semiconductor quantum wells analyzed by k.p-based Bloch equations}, volume={9746}, DOI={10.1117/12.2208572}, number={97460W}, booktitle={Ultrafast Phenomena and Nanophotonics XX}, publisher={SPIE}, author={Podzimski, Reinold and Duc, Huynh Thanh and Priyadarshi, Shekhar and Schmidt, Christian and Bieler, Mark and Meier, Torsten}, editor={Betz, Markus and Elezzabi, Abdulhakem Y.}, year={2016}, collection={SPIE Proceedings} }' chicago: Podzimski, Reinold, Huynh Thanh Duc, Shekhar Priyadarshi, Christian Schmidt, Mark Bieler, and Torsten Meier. “Photocurrents in Semiconductors and Semiconductor Quantum Wells Analyzed by k.p-Based Bloch Equations.” In Ultrafast Phenomena and Nanophotonics XX, edited by Markus Betz and Abdulhakem Y. Elezzabi, Vol. 9746. SPIE Proceedings. SPIE, 2016. https://doi.org/10.1117/12.2208572. ieee: 'R. Podzimski, H. T. Duc, S. Priyadarshi, C. Schmidt, M. Bieler, and T. Meier, “Photocurrents in semiconductors and semiconductor quantum wells analyzed by k.p-based Bloch equations,” in Ultrafast Phenomena and Nanophotonics XX, 2016, vol. 9746, doi: 10.1117/12.2208572.' mla: Podzimski, Reinold, et al. “Photocurrents in Semiconductors and Semiconductor Quantum Wells Analyzed by k.p-Based Bloch Equations.” Ultrafast Phenomena and Nanophotonics XX, edited by Markus Betz and Abdulhakem Y. Elezzabi, vol. 9746, 97460W, SPIE, 2016, doi:10.1117/12.2208572. short: 'R. Podzimski, H.T. Duc, S. Priyadarshi, C. Schmidt, M. Bieler, T. Meier, in: M. Betz, A.Y. Elezzabi (Eds.), Ultrafast Phenomena and Nanophotonics XX, SPIE, 2016.' date_created: 2019-10-18T08:33:43Z date_updated: 2023-04-16T21:21:21Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '230' doi: 10.1117/12.2208572 editor: - first_name: Markus full_name: Betz, Markus last_name: Betz - first_name: Abdulhakem Y. full_name: Elezzabi, Abdulhakem Y. last_name: Elezzabi intvolume: ' 9746' language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Ultrafast Phenomena and Nanophotonics XX publication_status: published publisher: SPIE series_title: SPIE Proceedings status: public title: Photocurrents in semiconductors and semiconductor quantum wells analyzed by k.p-based Bloch equations type: conference user_id: '49063' volume: 9746 year: '2016' ... --- _id: '4246' abstract: - lang: eng text: Spins in semiconductor quantum dots have been considered as prospective quantum bit excitations. Their coupling to the crystal environment manifests itself in a limitation of the spin coherence times to the microsecond range, both for electron and hole spins. This rather short-lived coherence compared to atomic states asks for manipulations on timescales as short as possible. Due to the huge dipole moment for transitions between the valence and conduction band, pulsed laser systems offer the possibility to perform manipulations within picoseconds or even faster. Here, we report on results that show the potential of optical spin manipulations with currently available pulsed laser systems. Using picosecond laser pulses, we demonstrate optically induced spin rotations of electron and hole spins. We further realize the optical decoupling of the hole spins from the nuclear surrounding at the nanosecond timescales and demonstrate an all-optical spin tomography for interacting electron spin sub-ensembles. article_number: '17' article_type: original author: - first_name: S. full_name: Varwig, S. last_name: Varwig - first_name: E. full_name: Evers, E. last_name: Evers - first_name: A. full_name: Greilich, A. last_name: Greilich - first_name: D. R. full_name: Yakovlev, D. R. last_name: Yakovlev - first_name: Dirk full_name: Reuter, Dirk id: '37763' last_name: Reuter - first_name: A. D. full_name: Wieck, A. D. last_name: Wieck - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 - first_name: Artur full_name: Zrenner, Artur id: '606' last_name: Zrenner orcid: 0000-0002-5190-0944 - first_name: M. full_name: Bayer, M. last_name: Bayer citation: ama: Varwig S, Evers E, Greilich A, et al. Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots. Applied Physics B. 2016;122(1). doi:10.1007/s00340-015-6274-y apa: Varwig, S., Evers, E., Greilich, A., Yakovlev, D. R., Reuter, D., Wieck, A. D., Meier, T., Zrenner, A., & Bayer, M. (2016). Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots. Applied Physics B, 122(1), Article 17. https://doi.org/10.1007/s00340-015-6274-y bibtex: '@article{Varwig_Evers_Greilich_Yakovlev_Reuter_Wieck_Meier_Zrenner_Bayer_2016, title={Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots}, volume={122}, DOI={10.1007/s00340-015-6274-y}, number={117}, journal={Applied Physics B}, publisher={Springer Nature}, author={Varwig, S. and Evers, E. and Greilich, A. and Yakovlev, D. R. and Reuter, Dirk and Wieck, A. D. and Meier, Torsten and Zrenner, Artur and Bayer, M.}, year={2016} }' chicago: Varwig, S., E. Evers, A. Greilich, D. R. Yakovlev, Dirk Reuter, A. D. Wieck, Torsten Meier, Artur Zrenner, and M. Bayer. “Advanced Optical Manipulation of Carrier Spins in (In,Ga)As Quantum Dots.” Applied Physics B 122, no. 1 (2016). https://doi.org/10.1007/s00340-015-6274-y. ieee: 'S. Varwig et al., “Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots,” Applied Physics B, vol. 122, no. 1, Art. no. 17, 2016, doi: 10.1007/s00340-015-6274-y.' mla: Varwig, S., et al. “Advanced Optical Manipulation of Carrier Spins in (In,Ga)As Quantum Dots.” Applied Physics B, vol. 122, no. 1, 17, Springer Nature, 2016, doi:10.1007/s00340-015-6274-y. short: S. Varwig, E. Evers, A. Greilich, D.R. Yakovlev, D. Reuter, A.D. Wieck, T. Meier, A. Zrenner, M. Bayer, Applied Physics B 122 (2016). date_created: 2018-08-29T08:35:10Z date_updated: 2023-03-26T22:40:24Z department: - _id: '15' - _id: '230' - _id: '35' - _id: '170' - _id: '293' - _id: '292' doi: 10.1007/s00340-015-6274-y intvolume: ' 122' issue: '1' keyword: - Spin Polarization - Pump Pulse - Trion - Spin Component - Coherence Time language: - iso: eng publication: Applied Physics B publication_identifier: issn: - 0946-2171 - 1432-0649 publication_status: published publisher: Springer Nature status: public title: Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots type: journal_article user_id: '49063' volume: 122 year: '2016' ... --- _id: '13910' article_number: '34847' author: - first_name: Xuekai full_name: Ma, Xuekai id: '59416' last_name: Ma - first_name: Rodislav full_name: Driben, Rodislav last_name: Driben - first_name: Boris A. full_name: Malomed, Boris A. last_name: Malomed - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 citation: ama: Ma X, Driben R, Malomed BA, Meier T, Schumacher S. Two-dimensional symbiotic solitons and vortices in binary condensates with attractive cross-species interaction. Scientific Reports. 2016;6. doi:10.1038/srep34847 apa: Ma, X., Driben, R., Malomed, B. A., Meier, T., & Schumacher, S. (2016). Two-dimensional symbiotic solitons and vortices in binary condensates with attractive cross-species interaction. Scientific Reports, 6, Article 34847. https://doi.org/10.1038/srep34847 bibtex: '@article{Ma_Driben_Malomed_Meier_Schumacher_2016, title={Two-dimensional symbiotic solitons and vortices in binary condensates with attractive cross-species interaction}, volume={6}, DOI={10.1038/srep34847}, number={34847}, journal={Scientific Reports}, author={Ma, Xuekai and Driben, Rodislav and Malomed, Boris A. and Meier, Torsten and Schumacher, Stefan}, year={2016} }' chicago: Ma, Xuekai, Rodislav Driben, Boris A. Malomed, Torsten Meier, and Stefan Schumacher. “Two-Dimensional Symbiotic Solitons and Vortices in Binary Condensates with Attractive Cross-Species Interaction.” Scientific Reports 6 (2016). https://doi.org/10.1038/srep34847. ieee: 'X. Ma, R. Driben, B. A. Malomed, T. Meier, and S. Schumacher, “Two-dimensional symbiotic solitons and vortices in binary condensates with attractive cross-species interaction,” Scientific Reports, vol. 6, Art. no. 34847, 2016, doi: 10.1038/srep34847.' mla: Ma, Xuekai, et al. “Two-Dimensional Symbiotic Solitons and Vortices in Binary Condensates with Attractive Cross-Species Interaction.” Scientific Reports, vol. 6, 34847, 2016, doi:10.1038/srep34847. short: X. Ma, R. Driben, B.A. Malomed, T. Meier, S. Schumacher, Scientific Reports 6 (2016). date_created: 2019-10-18T08:16:22Z date_updated: 2023-03-26T22:45:28Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '297' - _id: '705' - _id: '230' - _id: '429' doi: 10.1038/srep34847 funded_apc: '1' intvolume: ' 6' language: - iso: eng project: - _id: '53' name: TRR 142 - _id: '54' name: TRR 142 - Project Area A - _id: '60' name: TRR 142 - Subproject A3 - _id: '59' name: TRR 142 - Subproject A2 - _id: '61' name: TRR 142 - Subproject A4 - _id: '56' name: TRR 142 - Project Area C - _id: '64' name: TRR 142 - Subproject A7 - _id: '72' name: TRR 142 - Subproject C2 - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Scientific Reports publication_identifier: issn: - 2045-2322 publication_status: published status: public title: Two-dimensional symbiotic solitons and vortices in binary condensates with attractive cross-species interaction type: journal_article user_id: '49063' volume: 6 year: '2016' ... --- _id: '43196' abstract: - lang: eng text: A method is presented to transfer a system of two-level atoms from a spin coherent state to a maximally spin squeezed Dicke state, relevant for quantum metrology and quantum information processing. The initial state is the ground state of an initial linear Hamiltonian that is gradually turned into a final quadratic Hamiltonian whose ground state is the selected Dicke state. We use compensating operators to suppress diabatic transitions to unwanted states that would occur if the change were not slow. We discuss the possibilities of constructing the compensating operators by sequential application of quadratic Hamiltonians available in experiments. article_number: '023815' author: - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 - first_name: T. full_name: Opatrný, T. last_name: Opatrný - first_name: H. full_name: Saberi, H. last_name: Saberi - first_name: E. full_name: Brion, E. last_name: Brion - first_name: K. full_name: Mølmer, K. last_name: Mølmer citation: ama: Meier T, Opatrný T, Saberi H, Brion E, Mølmer K. Counterdiabatic driving in spin squeezing and Dicke-state preparation. Physical Review A. 2016;93(2). doi:10.1103/PhysRevA.93.023815 apa: Meier, T., Opatrný, T., Saberi, H., Brion, E., & Mølmer, K. (2016). Counterdiabatic driving in spin squeezing and Dicke-state preparation. Physical Review A, 93(2), Article 023815. https://doi.org/10.1103/PhysRevA.93.023815 bibtex: '@article{Meier_Opatrný_Saberi_Brion_Mølmer_2016, title={Counterdiabatic driving in spin squeezing and Dicke-state preparation}, volume={93}, DOI={10.1103/PhysRevA.93.023815}, number={2023815}, journal={Physical Review A}, author={Meier, Torsten and Opatrný, T. and Saberi, H. and Brion, E. and Mølmer, K.}, year={2016} }' chicago: Meier, Torsten, T. Opatrný, H. Saberi, E. Brion, and K. Mølmer. “Counterdiabatic Driving in Spin Squeezing and Dicke-State Preparation.” Physical Review A 93, no. 2 (2016). https://doi.org/10.1103/PhysRevA.93.023815. ieee: 'T. Meier, T. Opatrný, H. Saberi, E. Brion, and K. Mølmer, “Counterdiabatic driving in spin squeezing and Dicke-state preparation,” Physical Review A, vol. 93, no. 2, Art. no. 023815, 2016, doi: 10.1103/PhysRevA.93.023815.' mla: Meier, Torsten, et al. “Counterdiabatic Driving in Spin Squeezing and Dicke-State Preparation.” Physical Review A, vol. 93, no. 2, 023815, 2016, doi:10.1103/PhysRevA.93.023815. short: T. Meier, T. Opatrný, H. Saberi, E. Brion, K. Mølmer, Physical Review A 93 (2016). date_created: 2023-03-29T21:03:04Z date_updated: 2023-03-29T21:06:10Z department: - _id: '293' doi: 10.1103/PhysRevA.93.023815 intvolume: ' 93' issue: '2' language: - iso: eng publication: Physical Review A publication_status: published status: public title: Counterdiabatic driving in spin squeezing and Dicke-state preparation type: journal_article user_id: '49063' volume: 93 year: '2016' ... --- _id: '43195' abstract: - lang: eng text: We propose an entanglement classification for symmetric quantum states based on their diagonal matrix-product-state (MPS) representation. The proposed classification, which preserves the stochastic local operation assisted with classical communication (SLOCC) criterion, relates entanglement families to the interaction length of Hamiltonians. In this manner, we establish a connection between entanglement classification and condensed matter models from a quantum information perspective. Moreover, we introduce a scalable nesting property for the proposed entanglement classification, in which the families for N parties carry over to the N + 1 case. Finally, using techniques from algebraic geometry, we prove that the minimal nontrivial interaction length n for any symmetric state is bounded by . article_number: '30188 ' author: - first_name: M. full_name: Sanz, M. last_name: Sanz - first_name: I.L. full_name: Egusquiza, I.L. last_name: Egusquiza - first_name: R. Di full_name: Candia, R. Di last_name: Candia - first_name: H. full_name: Saberi, H. last_name: Saberi - first_name: L. full_name: Lamata, L. last_name: Lamata - first_name: E. full_name: Solano, E. last_name: Solano citation: ama: Sanz M, Egusquiza IL, Candia RD, Saberi H, Lamata L, Solano E. Entanglement classification with matrix product states. Scientific Reports. 2016;6. doi:10.1038/srep30188 apa: Sanz, M., Egusquiza, I. L., Candia, R. D., Saberi, H., Lamata, L., & Solano, E. (2016). Entanglement classification with matrix product states. Scientific Reports, 6, Article 30188. https://doi.org/10.1038/srep30188 bibtex: '@article{Sanz_Egusquiza_Candia_Saberi_Lamata_Solano_2016, title={Entanglement classification with matrix product states}, volume={6}, DOI={10.1038/srep30188}, number={30188}, journal={Scientific Reports}, author={Sanz, M. and Egusquiza, I.L. and Candia, R. Di and Saberi, H. and Lamata, L. and Solano, E.}, year={2016} }' chicago: Sanz, M., I.L. Egusquiza, R. Di Candia, H. Saberi, L. Lamata, and E. Solano. “Entanglement Classification with Matrix Product States.” Scientific Reports 6 (2016). https://doi.org/10.1038/srep30188. ieee: 'M. Sanz, I. L. Egusquiza, R. D. Candia, H. Saberi, L. Lamata, and E. Solano, “Entanglement classification with matrix product states,” Scientific Reports, vol. 6, Art. no. 30188, 2016, doi: 10.1038/srep30188.' mla: Sanz, M., et al. “Entanglement Classification with Matrix Product States.” Scientific Reports, vol. 6, 30188, 2016, doi:10.1038/srep30188. short: M. Sanz, I.L. Egusquiza, R.D. Candia, H. Saberi, L. Lamata, E. Solano, Scientific Reports 6 (2016). date_created: 2023-03-29T20:57:37Z date_updated: 2023-04-01T20:46:41Z department: - _id: '293' doi: 10.1038/srep30188 intvolume: ' 6' language: - iso: eng main_file_link: - open_access: '1' url: https://www.nature.com/articles/srep30188 oa: '1' publication: Scientific Reports publication_status: published status: public title: Entanglement classification with matrix product states type: journal_article user_id: '49063' volume: 6 year: '2016' ... --- _id: '22942' abstract: - lang: eng text: "A microscopic approach that is based on the multisubband semiconductor Bloch equations formulated in the basis of a 14-band k⋅p model is employed to compute the temporal dynamics of photocurrents in GaAs quantum wells following excitation with femtosecond laser pulses. This approach provides a transparent description of the interband, intersubband, and intraband excitations, fully includes all resonant as well as off-resonant excitations, and treats the light-matter interaction nonperturbatively. For linearly polarized excitations, the photocurrents contain contributions from shift and rectification currents. We numerically compute and analyze these currents generated by excitation with femtosecond laser pulses for [110]- and [111]-oriented GaAs quantum wells. It is shown that the often employed perturbative \r\nχ(2) approach breaks down for peak fields larger than about 10 kV/cm, and that nonperturbative effects lead to a reduction of the peak values of the shift and rectification currents and to temporal oscillations that originate from Rabi flopping. In particular, we find a complex oscillatory photon energy dependence of the magnitudes of the shift and rectification currents. Our simulations demonstrate that this dependence is the result of mixing between the heavy- and light-hole valence bands. This is a surprising finding since the band mixing has an even larger influence on the strength of the photocurrents than the absorption coefficient. For [110]-oriented GaAs quantum wells, the calculated photon energy dependence is compared to experimental results, and good agreement is obtained. This validates our theoretical approach." article_number: '085305' author: - first_name: Huynh Thanh full_name: Duc, Huynh Thanh last_name: Duc - first_name: Reinold full_name: Podzimski, Reinold last_name: Podzimski - first_name: Shekhar full_name: Priyadarshi, Shekhar last_name: Priyadarshi - first_name: Mark full_name: Bieler, Mark last_name: Bieler - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 citation: ama: 'Duc HT, Podzimski R, Priyadarshi S, Bieler M, Meier T. Ultrafast shift and rectification photocurrents in GaAs quantum wells: Excitation intensity dependence and the importance of band mixing. Physical Review B. 2016;94(8). doi:10.1103/physrevb.94.085305' apa: 'Duc, H. T., Podzimski, R., Priyadarshi, S., Bieler, M., & Meier, T. (2016). Ultrafast shift and rectification photocurrents in GaAs quantum wells: Excitation intensity dependence and the importance of band mixing. Physical Review B, 94(8), Article 085305. https://doi.org/10.1103/physrevb.94.085305' bibtex: '@article{Duc_Podzimski_Priyadarshi_Bieler_Meier_2016, title={Ultrafast shift and rectification photocurrents in GaAs quantum wells: Excitation intensity dependence and the importance of band mixing}, volume={94}, DOI={10.1103/physrevb.94.085305}, number={8085305}, journal={Physical Review B}, publisher={American Physical Society}, author={Duc, Huynh Thanh and Podzimski, Reinold and Priyadarshi, Shekhar and Bieler, Mark and Meier, Torsten}, year={2016} }' chicago: 'Duc, Huynh Thanh, Reinold Podzimski, Shekhar Priyadarshi, Mark Bieler, and Torsten Meier. “Ultrafast Shift and Rectification Photocurrents in GaAs Quantum Wells: Excitation Intensity Dependence and the Importance of Band Mixing.” Physical Review B 94, no. 8 (2016). https://doi.org/10.1103/physrevb.94.085305.' ieee: 'H. T. Duc, R. Podzimski, S. Priyadarshi, M. Bieler, and T. Meier, “Ultrafast shift and rectification photocurrents in GaAs quantum wells: Excitation intensity dependence and the importance of band mixing,” Physical Review B, vol. 94, no. 8, Art. no. 085305, 2016, doi: 10.1103/physrevb.94.085305.' mla: 'Duc, Huynh Thanh, et al. “Ultrafast Shift and Rectification Photocurrents in GaAs Quantum Wells: Excitation Intensity Dependence and the Importance of Band Mixing.” Physical Review B, vol. 94, no. 8, 085305, American Physical Society, 2016, doi:10.1103/physrevb.94.085305.' short: H.T. Duc, R. Podzimski, S. Priyadarshi, M. Bieler, T. Meier, Physical Review B 94 (2016). date_created: 2021-08-06T08:41:28Z date_updated: 2023-04-16T21:18:16Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '230' doi: 10.1103/physrevb.94.085305 intvolume: ' 94' issue: '8' language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Physical Review B publication_identifier: issn: - 2469-9950 - 2469-9969 publication_status: published publisher: American Physical Society status: public title: 'Ultrafast shift and rectification photocurrents in GaAs quantum wells: Excitation intensity dependence and the importance of band mixing' type: journal_article user_id: '49063' volume: 94 year: '2016' ... --- _id: '13916' abstract: - lang: eng text: Nonlinearity is the driving force for numerous important effects in nature typically showing transitions between different regimes, regular, chaotic or catastrophic behavior. Localized nonlinear modes have been the focus of intense research in areas such as fluid and gas dynamics, photonics, atomic and solid state physics etc. Due to the richness of the behavior of nonlinear systems and due to the severe numerical demands of accurate three-dimensional (3D) numerical simulations presently only little knowledge is available on the dynamics of complex nonlinear modes in 3D. Here, we investigate the dynamics of 3D non-coaxial matter wave vortices that are trapped in a parabolic potential and interact via a repulsive nonlinearity. Our numerical simulations demonstrate the existence of an unexpected and fascinating nonlinear regime that starts immediately when the nonlinearity is switched-on and is characterized by a smooth dynamics representing torque-free precession with nutations. The reported motion is proven to be robust regarding various effects such as the number of particles, dissipation and trap deformations and thus should be observable in suitably designed experiments. Since our theoretical approach, i.e., coupled nonlinear Schrödinger equations, is quite generic, we expect that the obtained novel dynamical behavior should also exist in other nonlinear systems. article_number: '22758' author: - first_name: R. full_name: Driben, R. last_name: Driben - first_name: V. V. full_name: Konotop, V. V. last_name: Konotop - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 citation: ama: Driben R, Konotop VV, Meier T. Precession and nutation dynamics of nonlinearly coupled non-coaxial three-dimensional matter wave vortices. Scientific Reports. 2016;6. doi:10.1038/srep22758 apa: Driben, R., Konotop, V. V., & Meier, T. (2016). Precession and nutation dynamics of nonlinearly coupled non-coaxial three-dimensional matter wave vortices. Scientific Reports, 6, Article 22758. https://doi.org/10.1038/srep22758 bibtex: '@article{Driben_Konotop_Meier_2016, title={Precession and nutation dynamics of nonlinearly coupled non-coaxial three-dimensional matter wave vortices}, volume={6}, DOI={10.1038/srep22758}, number={22758}, journal={Scientific Reports}, author={Driben, R. and Konotop, V. V. and Meier, Torsten}, year={2016} }' chicago: Driben, R., V. V. Konotop, and Torsten Meier. “Precession and Nutation Dynamics of Nonlinearly Coupled Non-Coaxial Three-Dimensional Matter Wave Vortices.” Scientific Reports 6 (2016). https://doi.org/10.1038/srep22758. ieee: 'R. Driben, V. V. Konotop, and T. Meier, “Precession and nutation dynamics of nonlinearly coupled non-coaxial three-dimensional matter wave vortices,” Scientific Reports, vol. 6, Art. no. 22758, 2016, doi: 10.1038/srep22758.' mla: Driben, R., et al. “Precession and Nutation Dynamics of Nonlinearly Coupled Non-Coaxial Three-Dimensional Matter Wave Vortices.” Scientific Reports, vol. 6, 22758, 2016, doi:10.1038/srep22758. short: R. Driben, V.V. Konotop, T. Meier, Scientific Reports 6 (2016). date_created: 2019-10-18T08:30:23Z date_updated: 2023-04-16T21:22:52Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '230' doi: 10.1038/srep22758 funded_apc: '1' intvolume: ' 6' language: - iso: eng main_file_link: - open_access: '1' url: https://www.nature.com/articles/srep22758 oa: '1' publication: Scientific Reports publication_identifier: issn: - 2045-2322 publication_status: published status: public title: Precession and nutation dynamics of nonlinearly coupled non-coaxial three-dimensional matter wave vortices type: journal_article user_id: '49063' volume: 6 year: '2016' ...