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Reply to `Singularities of the mixed state phase'

J. Anandan·E. Sjöqvist·A. K. Pati·A. Ekert·M. Ericsson·D. K. L. Oi·V. Vedral
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Abstract

The only difference between Bhandari's viewpoint [quant-ph/0108058] 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 $2πn$, $n$ integer, may be distinguished experimentally in a history-dependent manner.

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J. Anandan, E. Sjöqvist, A. K. Pati, A. Ekert, M. Ericsson, D. K. L. Oi, V. Vedral. 2002-04-05. Reply to `Singularities of the mixed state phase'. https://doi.org/10.1103/physrevlett.89.268902

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