Decay of Supercurrents in Condensates in Optical Lattices
作者: Anatoli PolkovnikovEhud AltmanEugene DemlerBertrand I. HalperinMikhail D. Lukin
作者单位: 1Physics Department, Harvard University
刊名: Journal of Superconductivity, 2004, Vol.17 (5), pp.577-584
来源数据库: Springer Nature Journal
DOI: 10.1007/s10948-004-0771-2
关键词: Optical latticescondensatesdecay
英文摘要: Abstract(#br)In this paper we discuss decay of superfluid currents in boson lattice systems due to quantum tunneling and thermal activation mechanisms. We derive asymptotic expressions for the decay rate near the critical current in two regimes, deep in the superfluid phase and close to the superfluid-Mott insulator transition. The broadening of the transition at the critical current due to these decay mechanisms is more pronounced at lower dimensions. We also find that the crossover temperature below which quantum decay dominates is experimentally accessible in most cases. Finally, we discuss the dynamics of the current decay and point out the difference between low and high currents.
全文获取路径: Springer Nature  (合作)