Purification of impure density operators and the recovery of entanglements
Quantum Physics
2007-05-23 v1
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.
Keywords
Cite
@article{arxiv.quant-ph/9910080,
title = {Purification of impure density operators and the recovery of entanglements},
author = {V. I. Man'ko and G. Marmo and E. C. G. Sudarshan and F. Zaccaria},
journal= {arXiv preprint arXiv:quant-ph/9910080},
year = {2007}
}
Comments
6 pages