Abstract
We evaluate the Uhlmann fidelity between two one-mode displaced thermal states as the maximal probability transition between appropriate purifications of the given states. The optimal purifications defining the fidelity are proved to be two-mode displaced Gaussian states.
- Received 21 June 2007
DOI:https://doi.org/10.1103/PhysRevA.76.054307
©2007 American Physical Society