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PROPERTIES OF A DENSITY OPERATOR

المؤلف:  Shabnam Siddiqui

المصدر:  Quantum Mechanics

الجزء والصفحة:  223

27-3-2021

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PROPERTIES OF A DENSITY OPERATOR

i. The trace of a density operator is always unity:

ii. The density operator is a positive operator. For any arbitrary state ∣φ〉, the overlap of this state on the density operator is:

iii. For a pure state,

iv. For a mixed state,