TY - JOUR

T1 - Unambiguous discrimination between linearly independent quantum states

AU - Chefles, A.

PY - 1998/3/16

Y1 - 1998/3/16

N2 - 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.

AB - 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.

KW - quantum states

KW - quantum

KW - physics

KW - probability

UR - http://arxiv.org/PS_cache/quant-ph/pdf/9807/9807022v1.pdf

UR - http://dx.doi/org/10.1016/S0375-9601(98)00064-4

U2 - 10.1016/S0375-9601(98)00064-4

DO - 10.1016/S0375-9601(98)00064-4

M3 - Article

VL - 239

SP - 339

EP - 347

JO - Physics Letters A

JF - Physics Letters A

SN - 0375-9601

IS - 6

ER -