Published April 2005
| Version v1
Journal article
Optimal copying of entangled two-qubit states
Creators
- 1. Department of Physics, FJFI CVUT, Brehova 7, 115 19 Praha 1-Stare Mesto (Czech Republic)
- 2. Institut fuer Angewandte Physik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany)
Description
We investigate the problem of copying pure two-qubit states of a given degree of entanglement in an optimal way. Completely positive covariant quantum operations are constructed which maximize the fidelity of the output states with respect to two separable copies. These optimal copying processes hint at the intricate relationship between fundamental laws of quantum theory and entanglement
Additional details
Identifiers
- DOI
- 10.1103/PhysRevA.71.042332;
- arXiv
- arXiv:quant-ph/0411105v1;
Publishing Information
- Journal Title
- Physical Review. A
- Journal Volume
- 71
- Journal Issue
- 4
- Journal Page Range
- p. 042332-042332.10
- ISSN
- 1050-2947
- CODEN
- PLRAAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 36092874
- Subject category
- S74: ATOMIC AND MOLECULAR PHYSICS; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- CORRELATIONS; ENERGY LEVELS; INFORMATION THEORY; QUANTUM MECHANICS; QUANTUM NUMBERS
- Descriptors DEC
- MECHANICS
Optional Information
- Notes
- (c) 2005 The American Physical Society