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Master equation for retrodiction of quantum communication signals
S M Barnett1, D T Pegg, J Jeffers
1Department of Physics and Applied Physics, University of Strathclyde, Glasgow, United Kingdom.
Physical Review Letters
|April 6, 2001
Abstract:
We derive the master equation that governs the evolution of the measured state backwards in time in an open system. This allows us to determine probabilities for a given set of preparation events from the results of subsequent measurements, which has particular relevance to quantum communication.