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 also considered.
- Received 24 October 2002
DOI:https://doi.org/10.1103/PhysRevA.68.012305
©2003 American Physical Society