Spin-Depairing Transition of Attractive Fermi Gases on a Ring Driven by Synthetic Gauge Fields

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 Phys. Rev. B 81, 033103 (2010). We analyze cases of arbitrary filling and continuum model, and show how the filling affects the transition probability.

8 pages, 5 figures

References in corpus (6)

• Many-Body Physics with Ultracold Gases
• Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap
• Experimental demonstration of painting arbitrary and dynamic potentials for Bose-Einstein condensates
• Interferometry with Synthetic Gauge Fields
• A non-Hermitian critical point and the correlation length of strongly correlated quantum systems
• Probing ultracold Fermi gases with light-induced gauge potentials

Cited by in corpus (3)

• Non-Hermitian Hubbard model without the sign problem
• Spin-Depairing-Induced Exceptional Fermionic Superfluidity
• Ferromagnetic to antiferromagnetic transition of one-dimensional spinor Bose gases with spin-orbit coupling