Unambiguous quantum state filtering
Quantum Physics
2009-11-10 v1
Abstract
In this paper, we consider the generalized measurement where one particular quantum signal is unambiguously extracted from a set of non-commutative quantum signals and the other signals are filtered out. Simple expressions for the maximum detection probability and its POVM are derived. We applyl such unambiguous quantum state filtering to evaluation of the sensing of decoherence channels. The bounds of the precision limit for a given quantum state of probes and possible device implementations are discussed.
Cite
@article{arxiv.quant-ph/0304032,
title = {Unambiguous quantum state filtering},
author = {Masahiro Takeoka and Masashi Ban and Masahide Sasaki},
journal= {arXiv preprint arXiv:quant-ph/0304032},
year = {2009}
}
Comments
7 pages, 5 figures