Abstract
We review the procedure of purification of quantum states which provides recovery of interference and entanglement. The phase space distributions and quantum tomograms are discussed. The superposition principle and the composition law of density matrices are studied.
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Sudarshan, E.C.G. Search for Purity and Entanglement. Journal of Russian Laser Research 24, 195–203 (2003). https://doi.org/10.1023/A:1024090024283
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DOI: https://doi.org/10.1023/A:1024090024283