Phys. Rev. A 67, 010101(R) (2003) [4 pages]

Compatibility of quantum states

Abstract

References

Citing Articles (2)

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David Poulin^* and Robin Blume-Kohout^†
Theoretical Division, Los Alamos National Laboratory, MS-B210, Los Alamos, New Mexico 87545

Received 16 May 2002; published 15 January 2003

We introduce a measure of compatibility between quantum states—the likelihood that two density matrices describe the same object. Our measure is motivated by two elementary requirements, which lead to a natural definition. We list some properties of this measure, and discuss its relation to the problem of combining two observers’ states of knowledge.

URL:

http://link.aps.org/doi/10.1103/PhysRevA.67.010101

DOI:

10.1103/PhysRevA.67.010101

PACS:

03.65.Ta, 02.50.-r, 03.67.-a

^*Present address: Physics Department and IQC, University of Waterloo, Waterloo, Canada N2L 3G1. Email address: dpoulin@iqc.ca

^†Email address: rbk@socrates.Berkeley.edu

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Phys. Rev. A 67, 010101(R) (2003) [4 pages]

Compatibility of quantum states