



01078nas a2200145   4500008004100000245006200041210006200103260001400165490000700179520063300186100001900819700002300838700002700861856004400888       2006                        eng d00aEffects of finite temperature on the Mott insulator state0 aEffects of finite temperature on the Mott insulator state  c2006/1/200 v733 a  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.
1 aPupillo, Guido1 aWilliams, Carl, J.1 aProkof'ev, Nikolay, V.  uhttp://arxiv.org/abs/cond-mat/0407075v3