Spin-orbit Coupled Bose-Einstein Condensates in Spin-dependent Optical Lattices
Abstract
We investigate the ground-state properties of spin-orbit coupled Bose-Einstein condensates in spin-dependent optical lattices. The competition between the spin-orbit coupling strength and the depth of the optical lattice leads to a rich phase diagram. Without spin-orbit coupling, the spin-dependent optical lattices separate the condensates into alternating spin domains with opposite magnetization directions. With relatively weak spin-orbit coupling, the spin domain wall is dramatically changed from N\'{e}el wall to Bloch wall. For sufficiently strong spin-orbit coupling, vortex chains and antivortex chains are excited in the spin-up and spin-down domains respectively, corresponding to the formation of a lattice composed of meron-pairs and antimeron-pairs in the pseudospin representation. We also discuss how to observe these phenomena in real experiments.
Cite
@article{arxiv.1211.2097,
title = {Spin-orbit Coupled Bose-Einstein Condensates in Spin-dependent Optical Lattices},
author = {Wei Han and Suying Zhang and Wu-Ming Liu},
journal= {arXiv preprint arXiv:1211.2097},
year = {2013}
}