Optimal Measurement on Noisy Quantum Systems

Details Optimal Measurement on Noisy Quantum Systems Optimal Measurement on Noisy Quantum Systems

2009-06-24

arxiv.org/abs/0906.4463v3

Phys. Rev. Lett. 104, 020401 (2010)

Physics

Quantum Physics

4 pages, 1 figures

Scientific paper

10.1103/PhysRevLett.104.020401

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.

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