Wigner Function:from Ensemble Average of Density Operator to Its One Matrix Element in Entangled Pure States
Wigner Function:from Ensemble Average of Density Operator to Its One Matrix Element in Entangled Pure States
摘要
We show that the Wigner function W = Tr(△ρ) (an ensemble average of the density operator ρ, △ is theWigner operator) can be expressed as a matrix element of ρ in the entangled pure states. In doing so, converting fromquantum master equations to time-evolution equation of the Wigner functions seems direct and concise. The entangledstates are defined in the enlarged Fock space with a fictitious freedom.
基金
国家自然科学基金
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