Phys. Rev. A 68, 012305 (2003) [7 pages]Quantum inference of states and processesReceived 24 October 2002; published 9 July 2003 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 also considered. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.68.012305
DOI:
10.1103/PhysRevA.68.012305
PACS:
03.67.Hk, 03.65.-w
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