Mean-field dynamics to negative absolute temperatures in the Bose-Hubbard model
Mean-field dynamics to negative absolute temperatures in the Bose-Hubbard model
复制标题
Bose-Hubbard 模型中负绝对温度的平均场动力学
DOI:
10.1103/physreva.87.043611
复制
发表时间:
2012
影响因子:
2.9
通讯作者:
Ákos Rapp
中科院分区:
文献类型:
--
作者:
Ákos 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. [ S. Braun, J. P. Ronzheimer, M. Schreiber, S. S. Hodgman, T. Rom, I. Bloch and U. Schneider, Science 339 52 (2013)]. 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.