Geometric phase and quantum phase transition in the one-dimensional compass model
School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, 116024, P.R. China
Revised: 30 December 2009
Published online: 2 March 2010
We study the geometric phase of the ground state of the one-dimensional compass model in a transverse field. The critical properties of the system in terms of the geometric phase are calculated and discussed. The results show that the general character of quantum phase transitions (QPTs) in the model can be revealed by the Berry phase of the ground state. This study extends the relations between geometric phases and QPTs.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010