English

Frustrated superfluids in a non-Abelian flux

Quantum Gases 2017-12-19 v1

Abstract

We study possible superfluid states of the Rashba spin-orbit coupled (SOC) spinor bosons with the spin anisotropic interaction λ \lambda hopping in a square lattice. The frustrations from the non-abelian flux due to the SOC leads to novel spin-bond correlated superfluids. By using a recently developed systematic "order from quantum disorder" analysis, we not only determine the true quantum ground state, but also evaluate the mass gap in the spin sector at λ<1 \lambda < 1 , especially compute the the excitation spectrum of the Goldstone mode in the spin sector at λ=1 \lambda=1 which would be quadratic without the analysis. The analysis also leads to different critical exponents on the two sides of the 2nd order transition driven by a roton touchdown at λ=1 \lambda=1 . The intimate analogy at λ=1 \lambda=1 with the charge neutral Goldstone mode in the pseudo-spin sector in the Bilayer quantum Hall systems at the total filling factor νT=1 \nu_T=1 are stressed. The experimental implications and detections of these novel phenomena in cold atoms loaded on a optical lattice are presented.

Keywords

Cite

@article{arxiv.1712.06545,
  title  = {Frustrated superfluids in a non-Abelian flux},
  author = {Fadi Sun and Junsen Wang and Jinwu Ye and Youjin Deng},
  journal= {arXiv preprint arXiv:1712.06545},
  year   = {2017}
}

Comments

Revtex4-1, 12 pages, 8 figures