Unambiguous discrimination of mixed states

Journal Article · Tue Jul 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.010301· OSTI ID:20639841

Rudolph, Terry ^[1]; Spekkens, Robert W ^[2]; Turner, Peter S ^[3]

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1. Bell Labs, 600 Mountain Avenue, Murray Hill, New Jersey 07974, USA (United States)
2. Perimeter Institute for Theoretical Physics, 35 King St. North, Waterloo, Ontario, Canada N2J 2W9 (Canada)
3. Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario, Canada M5S 1A7 (Canada)

We present the conditions under which probabilistic error-free discrimination of mixed states is possible, and provide upper and lower bounds on the maximum probability of success for the case of two mixed states. We solve certain special cases exactly, and demonstrate how the problems of state filtering and state comparison can be recast as problems of mixed state unambiguous discrimination.

• OSTI ID: 20639841
• Journal Information: Physical Review. A, Vol. 68, Issue 1; Other Information: DOI: 10.1103/PhysRevA.68.010301; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
COMPARATIVE EVALUATIONS
CORRELATIONS
ENERGY LEVELS
ERRORS
MIXED STATE
PROBABILISTIC ESTIMATION
PROBABILITY
QUANTUM MECHANICS