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. © 2014 American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Buscemi, F., Hall, M., Ozawa, M., & Wilde, M. (2014). Noise and disturbance in quantum measurements: An information-theoretic approach. Physical Review Letters, 112 (5) https://doi.org/10.1103/PhysRevLett.112.050401