We address the problem of the information-disturbance tradeoff associated to the estimation of a quantum transformation and show how the extraction of information about a black box causes a perturbation of the corresponding input-output evolution. In the case of a black box performing a unitary transformation, randomly distributed according to the invariant measure, we give a complete solution of the problem, deriving the optimal tradeoff curve and presenting an explicit construction of the optimal quantum network.

Information - Disturbance Tradeoff in Estimating a Unitary Transformation

BISIO, ALESSANDRO;CHIRIBELLA, GIULIO;D'ARIANO, GIACOMO;PERINOTTI, PAOLO
2010-01-01

Abstract

We address the problem of the information-disturbance tradeoff associated to the estimation of a quantum transformation and show how the extraction of information about a black box causes a perturbation of the corresponding input-output evolution. In the case of a black box performing a unitary transformation, randomly distributed according to the invariant measure, we give a complete solution of the problem, deriving the optimal tradeoff curve and presenting an explicit construction of the optimal quantum network.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/223108
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