Reduction theorems for optimal unambiguous state discrimination of density matrices
Journal Article
·
· Physical Review. A
- Quantum Information Theory Group, ZEMO, University Erlangen-Nuernberg, Staudtstrasse 7/B2, D-91058 Erlangen (Germany) and Bell Labs, Lucent Technologies, 600-700 Mountain Avenue, Murray Hill, New Jersey 07974 (United States)
We present reduction theorems for the problem of optimal unambiguous state discrimination of two general density matrices. We show that this problem can be reduced to that of two density matrices that have the same rank n and are described in a Hilbert space of dimensions 2n. We also show how to use the reduction theorems to discriminate unambiguously between N mixed states (N{>=}2)
- OSTI ID:
- 20640024
- Journal Information:
- Physical Review. A, Vol. 68, Issue 2; Other Information: DOI: 10.1103/PhysRevA.68.022308; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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