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.
|Physical Review A - Atomic, Molecular, and Optical Physics
|Published - 2012 Jan 5
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics