量子踢转子是量子物理中一种典型的模型系统。作为一个被驱动的量子系统,它具有动力学局域性,特别是在动量空间中的安德森局域性。然而,相互作用的多体踢转子被认为破坏了局部化。
研究组为多体量子踢转子的李-林格(Lieb-Liniger)版本提供了多体动力学定位的证据。经过一些初始的演化,在一维几何中相互作用的量子简并玻色子原子的动量分布,被脉冲正弦势驱动了数百次后,停止扩散。该研究结果揭示了经典混沌世界与量子物理领域之间的界限。
附:英文原文
Title: Observation of many-body dynamical localization
Author: Yanliang Guo, Sudipta Dhar, Ang Yang, Zekai Chen, Hepeng Yao, Milena Horvath, Lei Ying, Manuele Landini, Hanns-Christoph Ngerl
Issue&Volume: 2025-08-14
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.
DOI: adn8625
Source: https://www.science.org/doi/10.1126/science.adn8625