中国物理B ›› 2010, Vol. 19 ›› Issue (4): 40512-040512.doi: 10.1088/1674-1056/19/4/040512

• GENERAL • 上一篇    下一篇

Geometric phases and quantum phase transitions in inhomogeneous XY spin-chains: Effect of the Dzyaloshinski-Moriya interaction

王林成, 闫俊彦, 衣学喜   

  1. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
  • 收稿日期:2009-09-02 修回日期:2009-09-29 出版日期:2010-04-15 发布日期:2010-04-15
  • 基金资助:
    Project supported by National Natural Science Foundation of China (Grant Nos.~10847108 and 10775023).

Geometric phases and quantum phase transitions in inhomogeneous XY spin-chains: Effect of the Dzyaloshinski-Moriya interaction

Wang Lin-Cheng(王林成) Yan Jun-Yan(闫俊彦), and Yi Xue-Xi(衣学喜)   

  1. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
  • Received:2009-09-02 Revised:2009-09-29 Online:2010-04-15 Published:2010-04-15
  • Supported by:
    Project supported by National Natural Science Foundation of China (Grant Nos.~10847108 and 10775023).

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.

Abstract: 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.

Key words: geometric phase, quantum phase transition, the Dzyaloshinski--Moriya interaction

中图分类号:  (Quantized spin models, including quantum spin frustration)

  • 75.10.Jm
75.10.Pq (Spin chain models) 03.67.-a (Quantum information) 03.65.Vf (Phases: geometric; dynamic or topological)