🌐فارسیEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусскийالعربيةفارسی한국어中文日本語EntityQ831774· pop 28· linked from 554 articlesماتریس چگالیAlso known as density operatormatrix describing a quantum system in a pure or mixed state, a statistical mixture of quantum statesAvailable in 26 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةArmenianBahasa IndonesiaConnectionsblock matrixEntitydefinite matrixEntityCategoriesFunctional analysisLev LandauQuantum information scienceStatistical mechanics