Ground states of a Bose-Einstein Condensate in a one-dimensional laser-assisted optical lattice.
Ground states of a Bose-Einstein Condensate in a one-dimensional laser-assisted optical lattice.
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一维激光辅助光学晶格中玻色-爱因斯坦凝聚体的基态
DOI:
10.1038/srep37679
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发表时间:
2016-11-24
影响因子:
4.6
通讯作者:
Ji AC
中科院分区:
文献类型:
--
作者:
Sun Q;Hu J;Wen L;Liu WM;Juzeliūnas G;Ji AC
We study the ground-state behavior of a Bose-Einstein Condensate (BEC) in a Raman-laser-assisted one-dimensional (1D) optical lattice potential forming a multilayer system. We find that, such system can be described by an effective model with spin-orbit coupling (SOC) of pseudospin (N-1)/2, where N is the number of layers. Due to the intricate interplay between atomic interactions, SOC and laser-assisted tunnelings, the ground-state phase diagrams generally consist of three phases–a stripe, a plane wave and a normal phase with zero-momentum, touching at a quantum tricritical point. More important, even though the single-particle states only minimize at zero-momentum for odd N, the many-body ground states may still develop finite momenta. The underlying mechanisms are elucidated. Our results provide an alternative way to realize an effective spin-orbit coupling of Bose gas with the Raman-laser-assisted optical lattice, and would also be beneficial to the studies on SOC effects in spinor Bose systems with large spin.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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作者:
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作者:
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影响因子:
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作者:
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通讯作者:
Dalibard, Jean