Observation of many-body dynamical localization.
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| Title: | Observation of many-body dynamical localization. |
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| Authors: | Guo, Yanliang, Dhar, Sudipta, Yang, Ang, Chen, Zekai, Yao, Hepeng, Horvath, Milena, Ying, Lei, Landini, Manuele, Nägerl, Hanns-Christoph |
| Source: | Science. 8/14/2025, Vol. 389 Issue 6761, p716-719. 4p. |
| Subjects: | Rotors, Quantum mechanics, Thermal neutrons, Bosons, Localization theory |
| Abstract: | The quantum kicked rotor is a paradigmatic model system in quantum physics. As a driven quantum system, it features dynamical localization, specifically Anderson localization in momentum space. However, the interacting many-body kicked rotor is believed to break localization. Here, we present evidence for many-body dynamical localization for the Lieb-Liniger version of the many-body quantum kicked rotor. After some initial evolution, the momentum distribution of interacting quantum-degenerate bosonic atoms in one-dimensional geometry, kicked hundreds of times by means of a pulsed sinusoidal potential, stops spreading. Our results shed light on the boundary between the classical, chaotic world and the realm of quantum physics. Editor's summary: Interactions in a many-body system often lead to thermalization. However, it has recently been theoretically predicted that an interacting one-dimensional bosonic gas subject to periodic "kicks" localizes instead of thermalizing. Guo et al. realized such a system using quantum-degenerate samples of cesium atoms and tuned the interaction strength from noninteracting to strongly interacting, finding localization in both limits. —Jelena Stajic [ABSTRACT FROM AUTHOR] |
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| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | The quantum kicked rotor is a paradigmatic model system in quantum physics. As a driven quantum system, it features dynamical localization, specifically Anderson localization in momentum space. However, the interacting many-body kicked rotor is believed to break localization. Here, we present evidence for many-body dynamical localization for the Lieb-Liniger version of the many-body quantum kicked rotor. After some initial evolution, the momentum distribution of interacting quantum-degenerate bosonic atoms in one-dimensional geometry, kicked hundreds of times by means of a pulsed sinusoidal potential, stops spreading. Our results shed light on the boundary between the classical, chaotic world and the realm of quantum physics. Editor's summary: Interactions in a many-body system often lead to thermalization. However, it has recently been theoretically predicted that an interacting one-dimensional bosonic gas subject to periodic "kicks" localizes instead of thermalizing. Guo et al. realized such a system using quantum-degenerate samples of cesium atoms and tuned the interaction strength from noninteracting to strongly interacting, finding localization in both limits. —Jelena Stajic [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00368075 |
| DOI: | 10.1126/science.adn8625 |
