quenchdynamicsofultracoldatomsinonedimensionalopticallatticeswithartificialgaugefields

	quenchdynamicsofultracoldatomsinonedimensionalopticallatticeswithartificialgaugefields
	Cai Xiaoming
刊名	chinesephysicsb
	2017
卷号	26 期号:8 页码:086701
ISSN号	1674-1056
英文摘要	We study the quench dynamics of noninteracting ultracold atoms loaded in one-dimensional(1D) optical lattices with artificial gauge fields, which are modeled by lattices with complex hopping coefficients. After suddenly changing the hopping coefficient, time evolutions of the density distribution, momentum distribution, and mass current at the center are studied for both finite uniform systems and trapped systems. Effects of filling factor, system size, statistics, harmonic trap, and phase difference in hopping are identified, and some interesting phenomena show up. For example, for a finite uniform fermionic system shock and rarefaction wave plateaus are formed at two ends, whose wave fronts move linearly with speed equaling to the maximal absolute group velocity. While for a finite uniform bosonic system the whole density distribution moves linearly at the group velocity. Only in a finite uniform fermionic system there can be a constant quasisteady- state current, whose amplitude is decided by the phase difference and filling factor. The quench dynamics can be tested in ultracold atoms with minimal modifications of available experimental techniques, and it is a very interesting and fundamental example of the transport phenomena and the nonequilibrium dynamics.
语种	英语
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/19348]
专题	中国科学院武汉物理与数学研究所
作者单位	中国科学院武汉物理与数学研究所
推荐引用方式 GB/T 7714	Cai Xiaoming. quenchdynamicsofultracoldatomsinonedimensionalopticallatticeswithartificialgaugefields[J]. chinesephysicsb,2017,26(8):086701.
APA	Cai Xiaoming.(2017).quenchdynamicsofultracoldatomsinonedimensionalopticallatticeswithartificialgaugefields.chinesephysicsb,26(8),086701.
MLA	Cai Xiaoming."quenchdynamicsofultracoldatomsinonedimensionalopticallatticeswithartificialgaugefields".chinesephysicsb 26.8(2017):086701.