https://doi.org/10.1140/epjb/e2011-20264-1
Regular Article
Mott insulator-superfluid phase transition in p-band triangle optical lattices with on-site rotation
1
Department of Experiment Teaching, Yancheng Institute of
Technology, Yancheng
224051, P.R.
China
2
Institute for Theoretical Physics and Department of Modern
Physics, University of Science and Technology of China, Hefei
230026, P.R.
China
a e-mail: hbb4236@mail.ustc.edu.cn
Received:
2
April
2011
Received in final form:
16
June
2011
Published online:
17
October
2011
In this paper we calculate the phase boundary between superfluid and Mott insulator in p-band triangle optical lattices with on-site rotation by means of the Gutzwiller approximation and the second-order perturbation theory. Importantly, we discuss the effects of on-site rotation on the phase boundary and find that it not only enhances the stability of Mott insulator, but also drives this phase transition instead of changing the chemical potential of the system.
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2011
