Quantum inference of states and processes
arXiv:quant-ph/0210146 · doi:10.1103/PhysRevA.68.012305
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.
7 pages, 4 figures
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