Bures distance between two displaced thermal states

Details Bures distance between two displaced thermal states Bures distance between two displaced thermal states

1997-03-27

arxiv.org/abs/quant-ph/9703051v4

Phys.Rev. A, 58, 869 (1998)

Physics

Quantum Physics

3 pages, RevTeX, no figures

Scientific paper

10.1103/PhysRevA.58.869

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 two--state systems. The scalar curvature turns out to have new interesting properties when compared to the curvature associated with squeezed thermal states.

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