Optimal purifications and fidelity for displaced thermal states
Quantum Physics
2009-11-13 v2
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.
Cite
@article{arxiv.0706.3204,
title = {Optimal purifications and fidelity for displaced thermal states},
author = {Paulina Marian and Tudor A. Marian},
journal= {arXiv preprint arXiv:0706.3204},
year = {2009}
}