理论物理通讯：英文版

Wigner Function：from Ensemble Average of Density Operator to Its Matrix Element in Entangled Pure States

FANHong-Yi

Published Jan 1, 2002• 0 citations

Abstract

We show that the Wigner function W=Tr(Δρ)( an ensemble average of the density operator ρ，Δis the Wigner operator) can be expressed as a matrix element of ρ in the entangled pure states.In doing so,converting from quantum master equations to time-evolution equation of the Wigner functions seems direct and concise,The entangled states are defined in the enlarged Fock space with a fictitious freedom.

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