NDLI: Two-body physics in quasi-low-dimensional atomic gases under spin

Content Provider	Springer Nature Link
Author	Wang, Jing Kun Yi, Wei Zhang, Wei
Copyright Year	2016
Abstract	One of the most dynamic directions in ultracold atomic gas research is the study of low-dimensional physics in quasi-low-dimensional geometries, where atoms are confined in strongly anisotropic traps. Recently, interest has significantly intensified with the realization of synthetic spin–orbit coupling (SOC). As a first step toward understanding the SOC effect in quasi-low-dimensional systems, the solution of two-body problems in different trapping geometries and different types of SOC has attracted great attention in the past few years. In this review, we discuss both the scattering-state and the bound-state solutions of two-body problems in quasi-one and quasi-two dimensions. We show that the degrees of freedom in tightly confined dimensions, in particular with the presence of SOC, may significantly affect system properties. Specifically, in a quasi-one-dimensional atomic gas, a one-dimensional SOC can shift the positions of confinement-induced resonances whereas, in quasitwo- dimensional gases, a Rashba-type SOC tends to increase the two-body binding energy, such that more excited states in the tightly confined direction are occupied and the system is driven further away from a purely two-dimensional gas. The effects of the excited states can be incorporated by adopting an effective low-dimensional Hamiltonian having the form of a two-channel model. With the bare parameters fixed by two-body solutions, this effective Hamiltonian leads to qualitatively different many-body properties compared to a purely low-dimensional model.
Starting Page	1
Ending Page	21
Page Count	21
File Format	PDF
ISSN	20950462
Journal	Frontiers of Physics
Volume Number	11
Issue Number	3
e-ISSN	20950470
Language	English
Publisher	Higher Education Press
Publisher Date	2016-01-06
Publisher Institution	Chinese Universities
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	artificial gauge field synthetic spin–orbit coupling quasi-low dimensional sysem Atomic, Molecular, Optical and Plasma Physics Condensed Matter Physics Particle and Nuclear Physics Astronomy, Astrophysics and Cosmology
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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