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.
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Anhui Univ, Sch Phys & Mat Sci, Hefei 230039, Peoples R ChinaAnhui Univ, Sch Phys & Mat Sci, Hefei 230039, Peoples R China
Song, Xue-ke
Wu, Tao
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Anhui Univ, Sch Phys & Mat Sci, Hefei 230039, Peoples R China
Fuyang Normal Coll, Sch Phys & Elect Sci, Fuyang 236037, Peoples R ChinaAnhui Univ, Sch Phys & Mat Sci, Hefei 230039, Peoples R China
Wu, Tao
Ye, Liu
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Anhui Univ, Sch Phys & Mat Sci, Hefei 230039, Peoples R ChinaAnhui Univ, Sch Phys & Mat Sci, Hefei 230039, Peoples R China