Is there contextuality for a single qubit - Quantum PhysicsReportar como inadecuado

Is there contextuality for a single qubit - Quantum Physics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: It was presented by Cabello and Nakamura A. Cabello, Phys. Rev. Lett. 90,190401 (2003), that the Kochen-Specker theorem applies to two dimensions ifone uses Positive Operator-Valued Measures. We show that contextuality in theirmodels is not of the Kochen-Specker type. It is rather the result of notkeeping track of the whole system on which the measurement is performed. Thisis connected to the fact that there is no one-to-one correspondence betweenPOVM elements and projectors on the extended Hilbert space and the same POVMelement has to originate from two different projectors when used in Cabello-sand Nakamura-s models. Moreover, we propose a hidden-variable formulation ofthe above models.

Autor: Andrzej Grudka, Pawel Kurzynski


Documentos relacionados