Purification of impure density operators and the recovery of entanglements

Details Purification of impure density operators and the recovery of entanglements Purification of impure density operators and the recovery of entanglements

1999-10-18

arxiv.org/abs/quant-ph/9910080v1

Physics

Quantum Physics

6 pages

Scientific paper

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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