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International Journal of Theoretical Physics

, Volume 52, Issue 9, pp 3132–3140 | Cite as

Geometric Phase of Two-Level Mixed State and Bloch Sphere Structure

  • Guolan Fu
  • Xiaoshan Liu
  • Z. S. Wang
Article

Abstract

Geometric phase of two-level mixed state is investigated by comparing our approach with kinematic one. The results show that in the kinematic one, the Berry phases emerge discontinuous points because of losing a physical contribution from one of two eigenstates of density matrix. In contrast, our approach is a smooth curve of initial angle, evolving time and decay rate because of the interference between the two eigenstates with the probability ensemble.

Keywords

Geometric phase Mixed state Bloch sphere 

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.College of Physics and Communication ElectronicsJiangxi Normal UniversityNanchangP.R. China

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