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

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...

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Bibliographic Details
Published in:Journal of physics. B, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2010-03, Vol.43 (6), p.065304-065304
Main Authors: Fialko, O, Ziegler, K
Format: Article
Language:English
Subjects:
Classical and quantum physics: mechanics and fields
Correlation
Dipping
Exact sciences and technology
Fermions
Fluctuation
Fundamental areas of phenomenology (including applications)
Lattice sites
Mathematical analysis
Matter waves
Optical lattices
Optics
Phase diagrams
Physics
Quantum fluctuations, quantum noise, and quantum jumps
Quantum optics
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Summary: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.
ISSN:0953-4075
1361-6455
DOI:10.1088/0953-4075/43/6/065304