Quantum Many-Body Scars in Optical Lattices.

Quantum Many-Body Scars in Optical Lattices.
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光学晶格中的量子多体疤痕。

DOI:
10.1103/physrevlett.124.160604
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发表时间:
2020
影响因子:
8.6
通讯作者:
J. Knolle
J. Knolle
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Hongzheng Zhao;Joseph Vovrosh;F. Mintert;J. Knolle

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量子多体痕的概念最近被提出来作为描述弱遍历破缺和本征态热化假设破坏的一种途径。我们提出了一个简单的设置,以产生量子多体疤痕的双调制玻色-哈伯德系统,可以很容易地实现在冷原子气体。的动力学被证明是由动力学约束出现通过密度辅助隧穿在一个高频率的扩展。我们找到了最佳的驱动参数的动力学约束跳跃,导致小的孤立子空间的惊吓本征态。实验签名和过渡到完全热化行为作为驱动频率的函数进行了分析。
The concept of quantum many-body scars has recently been put forward as a route to describe weak ergodicity breaking and violation of the eigenstate thermalization hypothesis. We propose a simple setup to generate quantum many-body scars in a doubly modulated Bose-Hubbard system which can be readily implemented in cold atomic gases. The dynamics are shown to be governed by kinetic constraints which appear via density-assisted tunneling in a high-frequency expansion. We find the optimal driving parameters for the kinetically constrained hopping which leads to small isolated subspaces of scared eigenstates. The experimental signatures and the transition to fully thermalizing behavior as a function of driving frequency are analyzed.
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