期刊
PHYSICAL REVIEW LETTERS
卷 112, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.050401
关键词
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资金
- Program for Improvement of Research Environment for Young Researchers from SCF
- MEXT of Japan
- ARC Centre of Excellence [CE110001027]
- John Templeton Foundations [35771]
- JSPS KAKENHI [21244007]
- MIC SCOPE [121806010]
- Centre de Recherches Mathematiques
- Department of Physics and Astronomy at LSU
- Grants-in-Aid for Scientific Research [21244007] Funding Source: KAKEN
We introduce information-theoretic definitions for noise and disturbance in quantum measurements and prove a state-independent noise-disturbance tradeoff relation that these quantities have to satisfy in any conceivable setup. Contrary to previous approaches, the information-theoretic quantities we define are invariant under the relabelling of outcomes and allow for the possibility of using quantum or classical operations to correct for the disturbance. We also show how our bound implies strong tradeoff relations for mean square deviations.
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