Bell Theorem for Nonclassical Part of Quantum Teleportation Process

Details Bell Theorem for Nonclassical Part of Quantum Teleportation Process Bell Theorem for Nonclassical Part of Quantum Teleportation Process

1999-12-07

arxiv.org/abs/quant-ph/9912029v1

Physics

Quantum Physics

4 pages, RevTeX, no figures

Scientific paper

10.1103/PhysRevA.62.032101

The quantum teleportation process is composed of a joint measurement performed upon two subsystems A and B (uncorrelated), followed by a unitary transformation (parameters of which depend on the outcome of the measurement) performed upon a third subsystem C (EPR correlated with system B). The information about the outcome of the measurement is transferred by classical means. The measurement performed upon the systems A and B collapses their joint wavefunction into one of the four {\it entangled} Bell states. It is shown here that this measurement process plus a possible measurement on the third subsystem (with classical channel switched off - no additional unitary transformation performed) cannot be described by a local realistic theory.

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