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Comment on "New Results on Frame-Proof Codes and Traceability Schemes"
Jan-Åke Larsson, Jacob Lofvenberg
In the paper "New Results on Frame-Proof Codes and Traceability Schemes" by Reihaneh Safavi-Naini and Yejing Wang [IEEE Trans. Inform. Theory, vol. 47, no. 7, pp. 3029-3033, Nov. 2…
Pentagrams and paradoxes
Piotr Badziag, Ingemar Bengtsson, Adan Cabello +2
Klyachko and coworkers consider an orthogonality graph in the form of a pentagram, and in this way derive a Kochen-Specker inequality for spin 1 systems. In some low-dimensional si…
Hidden variable models for quantum mechanics can have local parts
Jan-Åke Larsson, Adan Cabello
We criticize Colbeck and Renner's (CR's) statement that "any hidden variable model can only be compatible with quantum mechanics if its local part is trivial" [Phys. Rev. Lett. 101…
Minimum detection efficiency for a loophole-free violation of the Braunstein-Caves chained Bell inequalities
Adan Cabello, Jan-Åke Larsson, David Rodriguez
The chained Bell inequalities of Braunstein and Caves involving N settings per observer have some interesting applications. Here we obtain the minimum detection efficiency required…