Decay of superfluid currents in a moving system of strongly interacting bosons
Decay of superfluid currents in a moving system of strongly interacting bosons
We analyze the stability and decay of supercurrents of strongly interacting bosons on optical lattices. At the mean field level, the system undergoes an irreversible dynamic phase transition, whereby the current decays beyond a critical phase gradient that depends on the interaction strength. At commensurate filling the transition line smoothly …