Bose-Einstein condensates under a non-Hermitian spin-orbit coupling

• 作者: Hao-Wei Li Jia-Zheng Sun
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES
• 页码范围: 519-525
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/abd7e4

摘要

We study the properties of Bose-Einstein condensates under a non-Hermitian spin-orbit coupling (SOC),induced by a dissipative two-photon Raman process.We focus on the dynamics of the condensate at short times,when the impact of decoherence induced by quantum jumps is negligible and the dynamics is coherently driven by a non-Hermitian Hamil-tonian.Given the significantly modified single-particle physics by dissipative SOC,the interplay of non-Hermiticity and interaction leads to a quasi-steady-state phase diagram different from its Hermitian counterpart.In particular,we find that dissipation can induce a phase transition from the stripe phase to the plane-wave phase.We further map out the phase diagram with respect to the dissipation and interaction strengths,and finally investigate the stability of quasi-steady states through the time-dependent dissipative Gross-Pitaevskii equation.Our results are readily accessible based on standard experiments with synthetic spin-orbit couplings.