KnowraDensity matrixLinked fromLinked fromThe 17 pages that link to Density matrix, each with the reason it gives.All 17Broader topic 3Related 7Narrower topic 4Compared with 3Quantum decoherenceNarrower topic: It tracks coherence even when a system is entangled with degrees of freedom not observed.No-communication theoremNarrower topic: The theorem is expressed through local density matrices, not individual entangled-state descriptions.Lindblad equationNarrower topic: The equation governs how this representation changes over time.Hierarchical equations of motionNarrower topic: Hierarchy operators extend density-matrix descriptions to encode environmental memory.