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- Anandan, Jeeva S., et al.
(författare)
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Reply to Comment on `Geometric phases for mixed states in interferometry'
- 2002
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 89, s. 268902-
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The only difference between Bhandari's viewpoint and ours [Phys. Rev. Lett. 85, 2845 (2000)] is that our phase is defined modulo 2π, whereas Bhandari argues that two phases that differ by 2π n, n integer, may be distinguished experimentally in a history-dependent manner. (Reply to the Comment in Phys. Rev. Lett. 89, 268901 (2001) by R. Bhandari.)
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- Sjöqvist, Erik, et al.
(författare)
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Geometric phases for mixed states in interferometry
- 2000
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 85:14, s. 2845-2849
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Tidskriftsartikel (refereegranskat)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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