Floquet engineering tunable periodic gauge fields and simulating real topological phases in a cold-alkaline-earth-metal-atom optical lattice

IF 2.9 2区 物理与天体物理 Q2 Physics and Astronomy Physical Review A Pub Date : 2024-08-06 DOI:10.1103/physreva.110.023308
Wei Wang, Zheng Zhang, Gui-Xin Tang, Tao Wang
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Abstract

We propose to synthesize tunable periodic gauge fields via Floquet engineering cold-alkaline-earth-metal atoms in one-dimensional optical lattice. The artificial magnetic flux is designed to emerge during the combined process of Floquet photon-assisted tunneling and internal state transitions. By varying the initial phases of the driving protocol, our proposal presents the ability to smoothly tune the periodic flux. Moreover, we demonstrate that the effective two-leg flux ladder model can simulate one typical real topological insulator, which is described by the first Stiefel-Whitney class and protected by the space-inversion–time-reversal symmetry. Benefiting from the long lifetime of excited states of alkaline-earth-metal atoms, our work opens new possibilities for exploiting the physics related to gauge fields, such as topological phases, in the current cold-atom platform.

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弗洛克特工程可调周期规场和模拟冷碱土金属原子光学晶格中的真实拓扑相位
我们建议在一维光学晶格中通过弗洛克工程冷碱土金属原子合成可调周期性规场。人工磁通量是在弗洛克光子辅助隧穿和内部状态转换的组合过程中产生的。通过改变驱动协议的初始阶段,我们的方案能够平滑地调节周期性磁通量。此外,我们还证明了有效的两腿通量阶梯模型可以模拟一个典型的真实拓扑绝缘体,该绝缘体由第一斯蒂费尔-惠特尼类描述,并受到空间-时间反转对称性的保护。得益于碱土金属原子激发态的长寿命,我们的工作为在当前的冷原子平台上利用诸如拓扑相等与规量场有关的物理学开辟了新的可能性。
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来源期刊
Physical Review A
Physical Review A 物理-光学
CiteScore
5.40
自引率
24.10%
发文量
0
审稿时长
2.2 months
期刊介绍: Physical Review A (PRA) publishes important developments in the rapidly evolving areas of atomic, molecular, and optical (AMO) physics, quantum information, and related fundamental concepts. PRA covers atomic, molecular, and optical physics, foundations of quantum mechanics, and quantum information, including: -Fundamental concepts -Quantum information -Atomic and molecular structure and dynamics; high-precision measurement -Atomic and molecular collisions and interactions -Atomic and molecular processes in external fields, including interactions with strong fields and short pulses -Matter waves and collective properties of cold atoms and molecules -Quantum optics, physics of lasers, nonlinear optics, and classical optics
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