Statistical quantum operation

Details Statistical quantum operation Statistical quantum operation

2009-03-23

arxiv.org/abs/0903.3875v1

Modern Physics Letters B 24, 2015 (2010)

Physics

Condensed Matter

Statistical Mechanics

10 pages, no figures

Scientific paper

10.1142/S0217984910024407

A generic unital positive operator-valued measure (POVM), which transforms a given stationary pure state to an arbitrary statistical state with perfect decoherence, is presented. This allows one to operationally realize thermalization as a special case. The loss of information due to randomness generated by the operation is discussed by evaluating the entropy. Thermalization of the bipartite spin-1/2 system is discussed as an illustrative example.

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