Resumo

BULNES, J.D.  e  PECHE, L.A.. Entrelazamiento cuántico espurio con matrices seudopuras extendidas 4 por 4. Rev. mex. fis. [online]. 2011, vol.57, n.3, pp.188-192. ISSN 0035-001X.

In this paper, we consider one mathematical extension for the concept NMR pseudo-pure matrix in the particular case of 4 × 4 matrices, from non-physical matrices. Examples of entangled density matrices are presented. Those entanglement, identified by the Peres-Horodecki criterion, is spurious because it is not possible to assign these matrices to any physical state of a system of NMR nuclear spins.

Palavras-chave : Quantum entanglement; Peres-Horodecki criterion; pseudo-pure state.

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