Superfluid-Superfluid Phase Transitions in Two-Component Bose System
摘要
Depending on the Hamiltonian parameters, two-component bosons in an optical lattice can form at least three different superfluid phases in which both components participate in the superflow: a (strongly interacting) mixture of two miscible superfluids (2SF), a paired superfluid vacuum (PSF), and (at a commensurate total filling factor) the super-counter-fluid state (SCF). We study universal properties of the 2SF-PSF and 2SF-SCF quantum phase transitions and show that (i) they can be mapped onto each other, and (ii) their universality class is identical to the (d+1)-dimensional normal-superfluid transition in a single-component liquid. Finite-temperature 2SF-PSF(SCF) transitions and the topological properties of 2SF-PSF(SCF) interfaces are also discussed.
引用
@article{arxiv.cond-mat/0305694,
title = {Superfluid-Superfluid Phase Transitions in Two-Component Bose System},
author = {A. Kuklov and N. Prokof'ev and B. Svistunov},
journal= {arXiv preprint arXiv:cond-mat/0305694},
year = {2009}
}
备注
4pages, 2 figures, REVTeX