Geometric phases for mixed states in interferometry

Sjoqvist, E and Pati, A K and Ekert, A and Anandan, J S and Ericsson, M and Oi, D K L and Vedral, V (2000) Geometric phases for mixed states in interferometry. Physical Review Letters, 85 (14). pp. 2845-2849. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.85.2845)

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Abstract

We provide a physical prescription based on interferometry for introducing the total phase of a mixed state undergoing unitary evolution, which has been an elusive concept in the past. We define the parallel transport condition that provides a connection form for obtaining the geometric phase for mixed states. The expression for the geometric phase for mixed state reduces to well known formulas in the pure state case when a system undergoes noncyclic and unitary quantum evolution.

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• Item metadata

  Item type:	Article
  ID code:	35349
  Dates:	Date Event 2 October 2000 Published
  Subjects:	Science > Physics > Optics. Light Science > Physics
  Department:	Faculty of Science > Physics
  Depositing user:	Pure Administrator
  Date deposited:	03 Nov 2011 16:21
  Last modified:	08 Apr 2024 19:38
  Related URLs:	Journal or Publication
  URI:	https://strathprints.strath.ac.uk/id/eprint/35349