Bayes' theorem and quantum retrodiction
Quantum Physics
2015-06-26 v1
Abstract
We derive on the basis of Bayes' theorem a simple but general expression for the retrodicted premeasurement state associated with the result of any measurement. The retrodictive density operator is the normalised probability operator measure element associated with the result. We examine applications to quantum optical cryptography and to the optical beam splitter.
Cite
@article{arxiv.quant-ph/0106139,
title = {Bayes' theorem and quantum retrodiction},
author = {Stephen M. Barnett and David T. Pegg and John Jeffers},
journal= {arXiv preprint arXiv:quant-ph/0106139},
year = {2015}
}
Comments
22 pages no figures