Master Equation for Retrodiction of Quantum Communication Signals
Stephen Mark Barnett, David Thomas Pegg, John R. Jeffers, Ottavia Jedrkiewicz · Physical Review Letters · 2001
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.