1211.4350 (Akos Rapp)

Mean-field dynamics to negative absolute temperatures in the
Bose-Hubbard model    [PDF]

Akos Rapp

We apply time-dependent Gutzwiller mean-field theory to provide a qualitative understanding for bosons in optical lattices that approach states corresponding to negative absolute temperatures. We perform the dynamical simulations to relate to the recent experiments by Braun et al., Ref.[1]. Time-of-flight images calculated from the two-dimensional numerical simulations reproduce characteristics of the experimental observations, in particular, the emergence of the four peaks at the corners of the Brillouin zone.

View original: http://arxiv.org/abs/1211.4350