Unambiguous Discrimination Between Linearly-Independent Quantum States
Quantum Physics
2009-10-31 v1
Abstract
The theory of generalised measurements is used to examine the problem of discriminating unambiguously between non-orthogonal pure quantum states. Measurements of this type never give erroneous results, although, in general, there will be a non-zero probability of a result being inconclusive. It is shown that only linearly-independent states can be unambiguously discriminated. In addition to examining the general properties of such measurements, we discuss their application to entanglement concentration.
Cite
@article{arxiv.quant-ph/9807022,
title = {Unambiguous Discrimination Between Linearly-Independent Quantum States},
author = {Anthony Chefles},
journal= {arXiv preprint arXiv:quant-ph/9807022},
year = {2009}
}