Effects of finite temperature on the Mott insulator state

Details Effects of finite temperature on the Mott insulator state Effects of finite temperature on the Mott insulator state

2004-07-02

arxiv.org/abs/cond-mat/0407075v3

Phys. Rev. A 73, 013408 (2006)

Physics

Condensed Matter

Other Condensed Matter

6 pages, 5 figures; Final version, published in PRA

Scientific paper

10.1103/PhysRevA.73.013408

We investigate the effects of finite temperature on ultracold Bose atoms confined in an optical lattice plus a parabolic potential in the Mott insulator state. In particular, we analyze the temperature dependence of the density distribution of atomic pairs in the lattice, by means of exact Monte-Carlo simulations. We introduce a simple model that quantitatively accounts for the computed pair density distributions at low enough temperatures. We suggest that the temperature dependence of the atomic pair statistics may be used to estimate the system's temperature at energies of the order of the atoms' interaction energy.

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