Probing the FFLO phase by double occupancy modulation spectroscopy

Details Probing the FFLO phase by double occupancy modulation spectroscopy Probing the FFLO phase by double occupancy modulation spectroscopy

2010-04-07

arxiv.org/abs/1004.1076v1

Phys. Rev. Lett. 104, 236402 (2010)

Physics

Condensed Matter

Quantum Gases

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.104.236402

We propose here that for a spin-imbalanced two-component attractive Fermi gas loaded in a 1D optical lattice in presence of an harmonic confining potential, the observation of the change in the double occupancy after a lattice depth modulation can provide clear evidence of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase. Simulating the time evolution of the system, we can characterize the double occupancy spectrum for different initial conditions, relating its features to the FFLO wavevector $q$. In particular, the narrowing of the width of the spectrum can be related, through Bethe-ansatz equations in the strongly interacting limit, to the FFLO wavevector $q$.

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