EntityQ831774· pop 28· linked from 554 articlesdensity matrixSign in to savematrix describing a quantum system in a pure or mixed state, a statistical mixture of quantum statesConnectionsblock matrixEntitydefinite matrixEntitySchrödinger's catEntityquantum entanglementEntityinterferenceEntitywave functionEntityeigenvectors and eigenvaluesEntityquantum computingEntityscatteringEntityquantum stateEntityinvertible matrixEntityadjacency matrixEntitypolarizerEntityphase spaceEntityquantum information scienceEntityprojectionEntityband matrixEntityunimodular matrixEntityPhase space formulationEntityFoundations of PhysicsEntityCategoriesFunctional analysisLev LandauQuantum information scienceStatistical mechanics