Nonequilibrium quantum phase transition in a spinor quantum gas in a lattice coupled to a membrane

doi:10.1103/PhysRevA.100.053616

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	Nonequilibrium quantum phase transition in a spinor quantum gas in a lattice coupled to a membrane
	Xu, Xingran 1,2,3; Zhang, Zhidong 2,3; Liang, Zhaoxin 1
刊名	PHYSICAL REVIEW A
	2019-11-19
卷号	100 期号:5 页码:11
ISSN号	2469-9926
DOI	10.1103/PhysRevA.100.053616
通讯作者	Liang, Zhaoxin(zhxliang@gmail.com)
英文摘要	Recently, a novel kind of hybrid atom-optomechanical system, consisting of atoms in a lattice coupled to a membrane, has been experimentally realized [A. Vochezer et al., Phys. Rev. Lett. 120, 073602 (2018)], which promises a viable contender in the competitive field of simulating nonequilibrium many-body physics. Here we are motivated to investigate a spinor Bose gas coupled to a vibrational mode of a nanomembrane, focusing on analyzing the role of the spinor degrees of freedom therein. Through an adiabatic elimination of the degrees of freedom of the quantum oscillator, we derive an effective Hamiltonian which reveals a competition between the force localizing the atoms and the membrane displacement. We analyze the dynamical stability of the steady state using the Bogoliubov-de Gennes approach and derive the stationary phase diagram in the parameter space. Then, we investigate the first-order nonequilibrium quantum phase transition (NQPT) from a localized symmetric state of the atom cloud to a shifted symmetry-broken state, characterized by the occurrence of a hysteresis. Moreover we present a detailed analysis of the effects of the spin degree of freedom on NQPT. Our work presents a simple way to study the effects of the spinor degree of freedom on the nonequilibrium nonlinear phenomena that is complementary to ongoing experiments on the hybrid atom-optomechanical system.
资助项目	Natural Science Foundation of China[11274315] ; Youth Innovation Promotion Association CAS[2013125]
WOS研究方向	Optics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000497784000007
资助机构	Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/136071]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liang, Zhaoxin
作者单位	1.Zhejiang Normal Univ, Dept Phys, Jinhua 321004, Zhejiang, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Xu, Xingran,Zhang, Zhidong,Liang, Zhaoxin. Nonequilibrium quantum phase transition in a spinor quantum gas in a lattice coupled to a membrane[J]. PHYSICAL REVIEW A,2019,100(5):11.
APA	Xu, Xingran,Zhang, Zhidong,&Liang, Zhaoxin.(2019).Nonequilibrium quantum phase transition in a spinor quantum gas in a lattice coupled to a membrane.PHYSICAL REVIEW A,100(5),11.
MLA	Xu, Xingran,et al."Nonequilibrium quantum phase transition in a spinor quantum gas in a lattice coupled to a membrane".PHYSICAL REVIEW A 100.5(2019):11.