Spin-depairing transition of attractive Fermi gases on a ring driven by synthetic gauge fields

Shun Uchino, Norio Kawakami

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Motivated by the recent experimental realization of synthetic gauge fields in ultracold atoms, we investigate one-dimensional attractive Fermi gases with a time-dependent gauge flux on the spin sector. By combining the methods of the Bethe ansatz with complex twists and Landau-Dykhne, it is shown that a spin-depairing transition occurs, which may represent a nonequilibrium transition from fermionic superfluids to normal states with spin currents caused by a many-body quantum tunneling. For the case of the Hubbard ring at half filling, our finding forms a dual concept with the dielectric breakdown of the Mott insulator discussed in. We analyze cases of arbitrary filling and continuum model, and show how filling affects the transition probability.

Original languageEnglish
Article number013610
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume85
Issue number1
DOIs
Publication statusPublished - 2012 Jan 5
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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