Bures distance between two displaced thermal states
Abstract
The Bures distance between two displaced thermal states and the corresponding geometric quantities (statistical metric, volume element, scalar curvature) are computed. Under nonunitary (dissipative) dynamics, the statistical distance shows the same general features previously reported in the literature by Braunstein and Milburn for twostate systems. The scalar curvature turns out to have new interesting properties when compared to the curvature associated with squeezed thermal states.
 Publication:

Physical Review A
 Pub Date:
 August 1998
 DOI:
 10.1103/PhysRevA.58.869
 arXiv:
 arXiv:quantph/9703051
 Bibcode:
 1998PhRvA..58..869P
 Keywords:

 03.65.Bz;
 89.70.+c;
 Information theory and communication theory;
 Quantum Physics
 EPrint:
 3 pages, RevTeX, no figures