Chester P. Rubbo, Indubala I. Satija, William P. Reinhardt, Radha Balakrishnan, Ana Maria Rey, Salvatore R. Manmana
Mean-field dynamics of strongly interacting bosons has been shown to support
two species of solitons: one of Gross-Pitaevski (GP)-type where the condensate
fraction remains dark and a novel non-GP-type characterized by brightening of
the condensate fraction. Here we study the effects of quantum fluctuations on
these solitons using the adaptive time-dependent density matrix renormalization
group method, which takes into account the effect of strong correlations. We
use local observables as the density, condensate density and correlation
functions as well as the entanglement entropy to characterize the stability of
the initial states. We find both species of solitons to be stable under quantum
evolution for a finite duration, their tolerance to quantum fluctuations being
enhanced as the width of the soliton increases. We describe possible
experimental realizations in atomic Bose Einstein Condensates, polarized
degenerate Fermi gases, and in systems of polar molecules on optical lattices.
View original:
http://arxiv.org/abs/1202.3400
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