Lupo, Cosmo and Man'Ko, Volodya and Marmo, Giuseppe and Sudarshan, E. C. G. (2006) Partial scaling transform of multiqubit states as a criterion of separability. [Pubblicazione in rivista scientifica]


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Item Type: Pubblicazione in rivista scientifica
Uncontrolled Keywords: Entanglement, Quantum Information
Date Deposited: 07 Jun 2007
Last Modified: 30 Apr 2014 19:22


The partial scaling transform of the density matrix for multiqubit states is introduced to detect entanglement of the quantum state. The transform contains partial transposition as a special case. The scaling transform corresponds to partial time scaling of subsystem (or partial Planck constant scaling) which was used to formulate recently separability criterion for continous variables. A measure of entanglement which is a generalization of negativity measure is introduced being based on tomographic probability description of spin states.

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