Quantum Estimation Theory of Error and Disturbance in Quantum Measurement

2011/06/13 by Yu Watanabe, Masahito Ueda, Watanabe, Yu +1
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph

paper · pdf · doi:10.48550/arxiv.1106.2526

arxiv created 2011/06/13 · arxiv updated 2011/06/14

Abstract

We formulate the error and disturbance in quantum measurement by invoking quantum estimation theory. The disturbance formulated here characterizes the non-unitary state change caused by the measurement. We prove that the product of the error and disturbance is bounded from below by the commutator of the observables. We also find the attainable bound of the product.

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