Chiral Bloch-Zener oscillations of spin-orbit coupled cold atoms in an optical superlattice

被引：4
|
作者：
Li, Zhe-Han [1 ]
Zhou, Lu [1 ]
Li, Yan [1 ]
机构：
[1] East China Normal Univ, Sch Phys & Elect Sci, State Key Lab Precis Spect, Dept Phys, Shanghai 200241, Peoples R China
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2021年 / 54卷 / 03期
基金：
中国国家自然科学基金;
关键词：
chiral Bloch– Zener oscillation; optical superlattice; spin– orbit coupling;
D O I：
10.1088/1361-6455/abd879
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We study the Bloch oscillation (BO) dynamics of spin-orbit coupled cold atoms in a one-dimensional Su-Schrieffer-Heeger optical lattice. The Hamiltonian of our system can be mapped into a tilted SSH ladder pierced by an effective magnetic flux. Based on the calculation of Wannier-Stark states, we investigate dynamical properties of BOs with the chiral character of spin-momentum locking. Importantly, the chiral Bloch-Zener oscillations can be induced by adjusting system parameters. The corresponding Landau-Zener (LZ) tunneling probability is analytically derived by the LZ model and we found a good agreement with the numerical simulation.
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页数：6
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