Published January 15, 2010
| Version v1
Journal article
Optimal Measurement on Noisy Quantum Systems
- 1. Department of Physics, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)
- 2. ERATO Macroscopic Quantum Control Project, JST, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656 (Japan)
Description
We identify the optimal measurement for obtaining information about the original quantum state after the state to be measured has undergone partial decoherence due to noise. We quantify the information that can be obtained by the measurement in terms of the Fisher information and find its value for the optimal measurement. We apply our results to a quantum control scheme based on a spin-boson model.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevLett.104.020401;
- arXiv
- arXiv:0906.4463v3;
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 104
- Journal Issue
- 2
- Journal Page Range
- p. 020401-020401.4
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41115497
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- BOSONS; NOISE; QUANTUM INFORMATION; QUANTUM MECHANICS; SPIN
- Descriptors DEC
- ANGULAR MOMENTUM; INFORMATION; MECHANICS; PARTICLE PROPERTIES
Optional Information
- Notes
- (c) 2010 The American Physical Society