Retrodiction for quantum optical communications

S M  Barnett; D T  Pegg; J  Jeffers; O  Jedrkiewicz; R  Loudon

doi:10.1103/PhysRevA.62.022313

Retrodiction for quantum optical communications

S M Barnett, D T Pegg, J Jeffers, O Jedrkiewicz, R Loudon

Physics

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

Given the result of a measurement on the output of a quantum optical communication channel, we show how to calculate a retrodictive state at the input. This state can be used by the receiver to determine the probability that any one of a given set of states was selected by the transmitter. We establish the remarkably simple result that retrodicting the prepared input signal for an attenuating (amplifying) channel corresponds to predicting the measured output signal for an amplifying (attenuating) channel.

Original language	English
Pages (from-to)	-
Number of pages	4
Journal	Physical Review A
Volume	6202
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.62.022313
Publication status	Published - Aug 2000

Keywords

time evolution
mechanical systems
usual notion
amplifier
noise

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10.1103/PhysRevA.62.022313

Cite this

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KW - usual notion

KW - amplifier

KW - noise

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Retrodiction for quantum optical communications

Abstract

Keywords

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