Field-induced topological pair-density wave states in a multilayer optical lattice
Quantum Gases
2018-09-21 v1
Abstract
We study the superfluid phases of a Fermi gas in a multilayer optical lattice system in the presence of out-of-plane Zeeman field, as well as spin-orbit (SO) coupling. We show that the Zeeman field combined with the SO coupling leads to exotic topological pair-density wave (PDW) phases in which different layers possess different superfluid order parameters, even though each layer experiences the same Zeeman field and the SO coupling. We elucidate the mechanism of the emerging PDW phases, and characterize their topological properties by calculating the associated Chern numbers.
Keywords
Cite
@article{arxiv.1809.00433,
title = {Field-induced topological pair-density wave states in a multilayer optical lattice},
author = {Zhen-Fei Zheng and Guang-Can Guo and Han Pu and Xu-Bo Zou},
journal= {arXiv preprint arXiv:1809.00433},
year = {2018}
}
Comments
7 pages, 6 figures, accepted by Phys. Rev. A