Master Equation for Retrodiction of Quantum Communication Signals

Stephen M. Barnett; David T. Pegg; John Jeffers; Ottavia Jedrkiewicz

doi:10.1103/PhysRevLett.86.2455

Master Equation for Retrodiction of Quantum Communication Signals

Stephen M. Barnett, David T. Pegg, John Jeffers, and Ottavia Jedrkiewicz

Phys. Rev. Lett. 86, 2455 – Published 12 March 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.

Received 30 October 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.2455

Authors & Affiliations

Stephen M. Barnett¹, David T. Pegg², John Jeffers¹, and Ottavia Jedrkiewicz³

¹Department of Physics and Applied Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom
²School of Science, Griffith University, Nathan, Brisbane 4111, Australia
³Department of Electronic Systems Engineering, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom