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Competition between Vortex Unbinding and Tunneling in an Optical Lattice

M. A. Cazalilla·A. Iucci·T. Giamarchi
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Abstract

We study a system of two-dimensional Bose gases trapped in minima of a deep one-dimensional optical lattice potential. Increasing the tunneling amplitude between adjacent gases drives a deconfinement transition to a phase where coherence is established between neighboring two-dimensional gases. We compute the signature of this transition in the interference pattern of the system as well as in its rotational response, which provides a direct measurement of the superfluidity in the system.

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M. A. Cazalilla, A. Iucci, T. Giamarchi. 2007-01-30. Competition between Vortex Unbinding and Tunneling in an Optical Lattice. https://doi.org/10.1103/physreva.75.051603

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