Purification of impure density operators and the recovery of entanglements
classification
🪐 quant-ph
keywords
densityoperatorsphasepurificationquantumadditiondependentdetermined
read the original abstract
The need to retain the relative phases in quantum mechanics implies an addition law parametrized by a phase of two density operators required for the purification of a density matrix. This is shown with quantum tomography and the Wigner function. Entanglement is determined in terms of phase dependent multiplication.
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