Tuesday, February 21, 2012

1202.4151 (Marianne Bauer et al.)

Dipolar gases in one-dimensional coupled tubes    [PDF]

Marianne Bauer, Meera M. Parish
We consider dipolar bosons in two tubes of one-dimensional lattices, where
the dipoles are aligned to be maximally repulsive and the particle filling
fraction is the same in each tube. In the classical limit of zero inter-site
hopping, the particles arrange themselves into an ordered crystal for any
rational filling fraction, forming a complete devil's staircase like in the
single tube case. Turning on hopping within each tube then gives rise to a
competition between the crystalline Mott phases and a liquid of defects or
solitons. However, for the two-tube case, we find that solitons from different
tubes can bind into pairs for certain topologies of the filling fraction. This
provides an intriguing example of pairing that is purely driven by correlations
close to a Mott insulator.
View original: http://arxiv.org/abs/1202.4151

No comments:

Post a Comment