EntityQ2122243· pop 25· linked from 689 articlesquantum informationSign in to saveinformation that is held in the state of a quantum systemConnectionsquantum computingEntityquantum mechanicsEntitySchrödinger's catEntityinformation entropyEntityEPR paradoxEntitybra–ket notationEntityquantum opticsEntityquantum information scienceEntitydensity matrixEntityquantum decoherenceEntitymeasurement in quantum mechanicsEntityquantum key distributionEntityquantum gateEntityDeutsch–Jozsa algorithmEntitytrapped ion quantum computerEntityquantum clockEntityquantum engineeringEntitymathematicsEntityphilosophyEntitycomputerEntityCategoriesQuantum information theory