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论文类型： 期刊论文

发表时间： 2010-04-01

发表刊物： CHINESE PHYSICS B

收录刊物： SCIE、EI、ISTIC

卷号： 19

期号： 4

ISSN号： 1674-1056

关键字： geometric phase; quantum phase transition; the Dzyaloshinski-Moriya interaction

摘要： We study geometric phases of the ground states of inhomogeneous XY spin chains in transverse fields with Dzyaloshinski-Moriya (DM) interaction, and investigate the effect of the DM interaction on the quantum phase transition (QPT) of such spin chains. The results show that the DM interaction could influence the distribution of the regions of QPTs but could not produce new critical points for the spin-chain. This study extends the relation between geometric phases and QPTs.