Three-dimensional quasi-Tonks gas in a harmonic trap

Details Three-dimensional quasi-Tonks gas in a harmonic trap Three-dimensional quasi-Tonks gas in a harmonic trap

2003-04-07

arxiv.org/abs/cond-mat/0304141v2

Physics

Condensed Matter

4 pages, 3 figures, misprints corrected

Scientific paper

10.1103/PhysRevLett.91.110401

We analyze the macroscopic dynamics of a Bose gas in a harmonic trap with a superimposed two-dimensional optical lattice, assuming a weak coupling between different lattice sites. We consider the situation in which the local chemical potential at each lattice site can be considered as that provided by the Lieb-Liniger solution. Due to the weak coupling between sites and the form of the chemical potential, the three-dimensional ground-state density profile and the excitation spectrum acquire remarkable properties different from both 1D and 3D gases. We call this system a quasi-Tonks gas. We discuss the range of applicability of this regime, as well as realistic experimental situations where it can be observed.

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