Physics – Quantum Physics
Scientific paper
2001-04-30
Phys. Rev. A 66, 033801 (2002)
Physics
Quantum Physics
12 pages, 12 figures
Scientific paper
10.1103/PhysRevA.66.033801
We show how polarisation measurements on the output fields generated by parametric down conversion will reveal a violation of multi-particle Bell inequalities, in the regime of both low and high output intensity. In this case each spatially separated system, upon which a measurement is performed, is comprised of more than one particle. In view of the formal analogy with spin systems, the proposal provides an opportunity to test the predictions of quantum mechanics for spatially separated higher spin states. Here the quantum behaviour possible even where measurements are performed on systems of large quantum (particle) number may be demonstrated. Our proposal applies to both vacuum-state signal and idler inputs, and also to the quantum-injected parametric amplifier as studied by De Martini et al. The effect of detector inefficiencies is included.
Martini Francesco de
Munro William J.
Reid Mark D.
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