PT Journal
AU Zhao, X
   McLain, MA
   Vijande, J
   Ferrando, A
   Carr, LD
   Garcia-March, MA
TI Nonequilibrium quantum dynamics of partial symmetry breaking for ultracold bosons in an optical lattice ring trap
SO New Journal of Physics
JI New J. Phys.
PY 2019
BP 043042
EP 13pp
VL 21
DI 10.1088/1367-2630/ab0cb0
LA English
DE partial symmetry breaking; ultracold boson; ring trap; nonequilibrium quantum dynamics
AB A vortex in a Bose-Einstein condensate on a ring undergoes quantum dynamics in response to a quantum quench in terms of partial symmetry breaking from a uniform lattice to a biperiodic one. Neither the current, a macroscopic measure, nor fidelity, a microscopic measure, exhibit critical behavior. Instead, the symmetry memory succeeds in identifying the critical symmetry breaking at which the system begins to forget its initial symmetry state. We further identify a symmetry energy difference in the low lying excited states which trends with the symmetry memory.
ER