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quant-ph2000
Triviality of GHZ operators of higher spin
J. Savinien, J. Taron, R. Tarrach
We prove that local observables of the set of GHZ operators for particles of spin higher than 1/2 reduce to direct sums of the spin 1/2 operators , and, therefore, no ne…
quant-ph1997
Quantum separability, time reversal and canonical decompositions
Anna Sanpera, Rolf Tarrach, Guifre Vidal
We propose an interpretation of quantum separability based on a physical principle: local time reversal. It immediately leads to a simple characterization of separable quantum stat…