1. Density matrixA density matrix is a matrix that describes a quantum system in a mixed state, a statistical ensemble of several quantum states. (In contrast, a pure state is described by a single state vector). The density matrix is the quantum-mechanical analogue to a phase-space probability measure (probability distribution of position and momentum) in classical statistical mechanics. Mixed states arise in situations where there is classical uncertainty, i.e.
Read “Density matrix” on English Wikipedia
Read “密度行列” on Japanese Wikipedia
Read “Density matrix” on DBpedia
Read “Density matrix” on English Wikipedia
Read “密度行列” on Japanese Wikipedia
Read “Density matrix” on DBpedia
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