Masaya Kunimi, Yusuke Kato
The soft-core boson system is one of the simplest models of supersolids, which have both off-diagonal long-range order (Bose-Einstein condensation) and diagonal long-range order (crystalline order). Although this model has been studied from various points of view, studies of the stability of current-flowing states are lacking. Solving the Gross-Pitaevskii and Bogoliubov equations, we present a phase diagram of stable states of a two-dimensional current-flowing soft-core boson system. We find that superfluid, supersolid, and stripe phases become stable. We also obtain excitation spectra in each phase.
View original:
http://arxiv.org/abs/1205.2126
No comments:
Post a Comment