Information-disturbance tradeoff in estimating a maximally entangled state
arXiv:quant-ph/0605158 · doi:10.1103/PhysRevLett.96.220502
Abstract
We derive the amount of information retrieved by a quantum measurement in estimating an unknown maximally entangled state, along with the pertaining disturbance on the state itself. The optimal tradeoff between information and disturbance is obtained, and a corresponding optimal measurement is provided.
4 pages. Accepted for publication on Physical Review Letters
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