Published July 16, 2007
| Version v1
Journal article
Fidelity of quantum operations
- 1. Lundbeck Foundation Theoretical Center for Quantum System Research, Department of Physics and Astronomy, University of Aarhus, Ny Munkegade, Bld. 1520, DK-8000 Arhus C (Denmark)
- 2. Department of Mathematical Sciences, University of Aarhus, Ny Munkegade, Bld. 1530, DK-8000 Arhus C (Denmark)
Description
We present a derivation and numerous applications of a compact explicit formula for the average fidelity of a quantum operation on a finite-dimensional quantum system. The formula can be applied to averages over particularly relevant subspaces; it is easily generalized to multi-component systems, and as a special result, we show that when the same completely positive trace-preserving map is applied to a large number of qubits with one-bit fidelity F close to unity, the average fidelity of the operation on the full K-bit register scales as F3K/2
Additional details
Identifiers
- DOI
- 10.1016/j.physleta.2007.02.069;
- arXiv
- arXiv:quant-ph/0701138v2;
- PII
- S0375-9601(07)00327-1;
Publishing Information
- Journal Title
- Physics Letters. A
- Journal Volume
- 367
- Journal Issue
- 1-2
- Journal Page Range
- p. 47-51
- ISSN
- 0375-9601
- CODEN
- PYLAAG
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39014178
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- INFORMATION THEORY; MANY-DIMENSIONAL CALCULATIONS; QUANTUM COMPUTERS; QUANTUM MECHANICS; QUBITS
- Descriptors DEC
- COMPUTERS; INFORMATION; MECHANICS; QUANTUM INFORMATION
Optional Information
- Copyright
- Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.