Prescription for experimental determination of the dynamics of a quantum black box

1 Oct 1996  ·  Isaac L. Chuang, M. A. Nielsen ·

We give an explicit prescription for experimentally determining the evolution operators which completely describe the dynamics of a quantum mechanical black box -- an arbitrary open quantum system. We show necessary and sufficient conditions for this to be possible, and illustrate the general theory by considering specifically one and two quantum bit systems. These procedures may be useful in the comparative evaluation of experimental quantum measurement, communication, and computation systems.

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Quantum Physics