Density matrix
In quantum mechanics, a density matrix is a matrix that describes the quantum state of a physical system. It allows for the calculation of the probabilities of the outcomes of any measurement performed upon this system, using the Born rule. It is a generalization of the more usual state vectors or wavefunctions: while those can only represent pure states, density matrices can also represent mixed states. Mixed states arise in quantum mechanics in two different situations: first when the preparation of the system is not fully known, and thus one must deal with a statistical ensemble of possible preparations, and second when one wants to describe a physical system which is entangled with another, as its state can not be described by a pure state.
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Algorithmic coolingAmplitude damping channelBasil HileyBekenstein boundBloch sphereBound stateBraunstein-Ghosh-Severini EntropyBures metricCanonical ensembleChannel-state dualityChoi–Jamiołkowski isomorphismClassical capacityClifford gatesCluster-expansion approachCoherence (physics)Coherent stateConsistent historiesCurie–Weiss lawDecoherence-free subspacesDensity MatrixDensity functional theoryDensity matricesDensity matrix embedding theoryDensity matrix renormalization groupDensity operatorDensity stateDephasingDiVincenzo's criteriaDiamond normDynamic nuclear polarizationDynamical picturesEinselectionElectromagnetically induced transparencyElectron densityEntanglement distillationEntanglement witnessEntropyEntropy (information theory)Entropy exchangeEntropy of network ensembles
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Density matrix
In quantum mechanics, a density matrix is a matrix that describes the quantum state of a physical system. It allows for the calculation of the probabilities of the outcomes of any measurement performed upon this system, using the Born rule. It is a generalization of the more usual state vectors or wavefunctions: while those can only represent pure states, density matrices can also represent mixed states. Mixed states arise in quantum mechanics in two different situations: first when the preparation of the system is not fully known, and thus one must deal with a statistical ensemble of possible preparations, and second when one wants to describe a physical system which is entangled with another, as its state can not be described by a pure state.
has abstract
Em mecânica quântica, uma matr ...... Landau e Felix Bloch) em 1927.
@pt
En mecánica cuántica se llama ...... ón tanto finita como infinita.
@es
En physique quantique, la matr ...... tes à partir de cette matrice.
@fr
En täthetsmatris, eller täthet ...... och dess matrisrepresentation.
@sv
In de kwantummechanica is een ...... oor Lev Landau en Felix Bloch.
@nl
In quantum mechanics, a densit ...... ence, and quantum information.
@en
L'operatore densità, in meccan ...... le fasi in meccanica classica.
@it
La matriu densitat, o operador ...... ntica i la física estadística.
@ca
Macierz gęstości (ang. density ...... zez Johna von Neumanna w 1927.
@pl
Matriz dentsitatea edo operado ...... eskribatzea posible ez denean.
@eu
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Em mecânica quântica, uma matr ...... Landau e Felix Bloch) em 1927.
@pt
En mecánica cuántica se llama ...... xigida por la teoría cuántica.
@es
En physique quantique, la matr ...... ne permettait pas de décrire.
@fr
En täthetsmatris, eller täthet ...... ndet är ett blandat tillstånd.
@sv
In de kwantummechanica is een ...... oor Lev Landau en Felix Bloch.
@nl
In quantum mechanics, a densit ...... be described by a pure state.
@en
L'operatore densità, in meccan ...... le fasi in meccanica classica.
@it
La matriu densitat, o operador ...... ntica i la física estadística.
@ca
Macierz gęstości (ang. density ...... zez Johna von Neumanna w 1927.
@pl
Matriz dentsitatea edo operado ...... eskribatzea posible ez denean.
@eu
label
Density matrix
@en
Dichteoperator
@de
Dichtheidsmatrix
@nl
Estado mixto
@es
Macierz gęstości
@pl
Matrice densité
@fr
Matriu densitat
@ca
Matriz densidade
@pt
Matriz dentsitate
@eu
Operatore densità
@it