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Quantum inference of states and processes

Miroslav Jezek, Jaromir Fiurasek, Zdenek Hradil

quant-pharXiv:quant-ph/0210146

Abstract

The maximum-likelihood principle unifies inference of quantum states and processes from experimental noisy data. Particularly, a generic quantum process may be estimated simultaneously with unknown quantum probe states provided that measurements on probe and transformed probe states are available. Drawbacks of various approximate treatments are considered.

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