Fidelity susceptibility and topological phase transition of a two-dimensional spin-orbit-coupled Fermi superfluid

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	Fidelity susceptibility and topological phase transition of a two-dimensional spin-orbit-coupled Fermi superfluid
	Luo, XB ; Zhou, KZ ; Liu, WM ; Liang, ZX ; Zhang, ZD
刊名	PHYSICAL REVIEW A
	2014
卷号	89 期号:4
ISSN号	1050-2947
通讯作者	Luo, XB (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
中文摘要	We investigate the fidelity susceptibility (FS) of a two-dimensional spin-orbit-coupled (SOC) Fermi superfluid and the topological phase transition driven by a Zeeman field in the perspective of its ground state wave function. Without Zeeman coupling, FS shows additional features characterizing the BCS-BEC crossover induced by SOC. In the presence of a Zeeman field, the topological phase transition is explored using both FS and the topological invariant. In particular, we obtain the analytical result of the topological invariant which explicitly demonstrates that the topological phase transition corresponds to a sudden change of the ground state wave function. Consequently, FS diverges at the phase transition point with its critical behavior being X proportional to ln vertical bar h-h(c vertical bar) . Based on this observation, we conclude that the topological phase transition can be detected by measuring the momentum distribution in cold atom experiments.
资助信息	National Natural Science Foundation of China [51331006, 11204321]; National Basic Research Program [2010CB934603]; Ministry of Science and Technology of China; NSF [PHY09-69790, PHY13-05891]; China Scholarship Council
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59476]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Luo, XB,Zhou, KZ,Liu, WM,et al. Fidelity susceptibility and topological phase transition of a two-dimensional spin-orbit-coupled Fermi superfluid[J]. PHYSICAL REVIEW A,2014,89(4).
APA	Luo, XB,Zhou, KZ,Liu, WM,Liang, ZX,&Zhang, ZD.(2014).Fidelity susceptibility and topological phase transition of a two-dimensional spin-orbit-coupled Fermi superfluid.PHYSICAL REVIEW A,89(4).
MLA	Luo, XB,et al."Fidelity susceptibility and topological phase transition of a two-dimensional spin-orbit-coupled Fermi superfluid".PHYSICAL REVIEW A 89.4(2014).