Wednesday, June 12, 2013

1306.2526 (Ole Andersson et al.)

Dynamic Distance Measures on Spaces of Isospectral Mixed Quantum States    [PDF]

Ole Andersson, Hoshang Heydari
Distance measures are indispensable tools in quantum information processing and quantum computing. This since they can be used to quantify to what extent information is preserved, or altered, by quantum processes. In this paper we propose a new distance measure for mixed quantum states, that we call the dynamic distance measure, and show that it is a proper distance measure. The dynamic distance measure is defined in terms of a measurable quantity, which make it very suitable for applications. In a final section we compare the dynamical distance measure with the well-known Bures distance.
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