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
	X. B. Luo; K. Z. Zhou; W. M. Liu; Z. X. Liang; Z. D. Zhang
	2014
发表期刊	Physical Review A
ISSN	1050-2947
卷号	89 期号:4
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.
部门归属	[luo, xuebing ; zhou, kezhao ; liang, zhaoxin ; zhang, zhidong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [zhou, kezhao] univ illinois, dept phys, urbana, il 61801 usa. [liu, wuming] chinese acad sci, inst phys, beijing 100080, peoples r china. ; luo, xb (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; kezhaozhou@gmail.com
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语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72886
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. B. Luo,K. Z. Zhou,W. M. Liu,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	X. B. Luo,K. Z. Zhou,W. M. Liu,Z. X. Liang,&Z. D. Zhang.(2014).Fidelity susceptibility and topological phase transition of a two-dimensional spin-orbit-coupled Fermi superfluid.Physical Review A,89(4).
MLA	X. B. Luo,et al."Fidelity susceptibility and topological phase transition of a two-dimensional spin-orbit-coupled Fermi superfluid".Physical Review A 89.4(2014).