Fundamental bounds on quantum measurements with a mixed apparatus
Quantum Physics
2007-05-23 v1
Abstract
We consider the apparatus in a quantum measurement process to be in a mixed state. We propose a simple upper bound on the probability of correctly distinguishing any number of mixed states. We use this to derive fundamental bounds on the efficiency of a measurement in terms of the temperature of the apparatus.
Cite
@article{arxiv.quant-ph/0004016,
title = {Fundamental bounds on quantum measurements with a mixed apparatus},
author = {S. Bose and V. Vedral},
journal= {arXiv preprint arXiv:quant-ph/0004016},
year = {2007}
}
Comments
3 pages, 2 figures