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.
| Language | English |
|---|---|
| Pages | - |
| Number of pages | 4 |
| Journal | Physical Review A |
| Volume | 6202 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Aug 2000 |
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Keywords
- time evolution
- mechanical systems
- usual notion
- amplifier
- noise
Cite this
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Retrodiction for quantum optical communications. / Barnett, S M ; Pegg, D T ; Jeffers, J ; Jedrkiewicz, O ; Loudon, R .
In: Physical Review A, Vol. 6202, No. 2, 08.2000, p. -.Research output: Contribution to journal › Article
TY - JOUR
T1 - Retrodiction for quantum optical communications
AU - Barnett, S M
AU - Pegg, D T
AU - Jeffers, J
AU - Jedrkiewicz, O
AU - Loudon, R
PY - 2000/8
Y1 - 2000/8
N2 - 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.
AB - 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.
KW - time evolution
KW - mechanical systems
KW - usual notion
KW - amplifier
KW - noise
U2 - 10.1103/PhysRevA.62.022313
DO - 10.1103/PhysRevA.62.022313
M3 - Article
VL - 6202
SP - -
JO - Physical Review A - Atomic, Molecular, and Optical Physics
T2 - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 2
ER -