Noise correlations of a strongly attractive spin-1/2 Fermi gas in an optical lattice

Details Noise correlations of a strongly attractive spin-1/2 Fermi gas in an optical lattice Noise correlations of a strongly attractive spin-1/2 Fermi gas in an optical lattice

2009-12-23

arxiv.org/abs/0912.4607v1

J. Phys. B: At. Mol. Opt. Phys. 43, 065304 (2010)

Physics

Condensed Matter

Quantum Gases

5 pages, 3 figures

Scientific paper

10.1088/0953-4075/43/6/065304

We calculate density-density correlations of an expanding gas of strongly attractive ultra-cold spin-1/2 fermions in an optical lattice. The phase diagram of the tightly bound fermion pairs exhibits a Bose-Einstein condensed state and a Mott insulating state with a single molecule per lattice site. We study the effects of quantum fluctuations on the correlations in both phases and show that they are especially important in the Bose-Einstein condensate state, leading to the appearance of singular peaks. In the Mott insulating state the correlations are characterized by sharp dips. This can be utilized in experiments to distinguish between these two phases.

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