Effect of the unpolarized spin state in spin-correlation measurement of two protons produced in the 12C(d,2He) reaction

Details Effect of the unpolarized spin state in spin-correlation measurement of two protons produced in the 12C(d,2He) reaction Effect of the unpolarized spin state in spin-correlation measurement of two protons produced in the 12C(d,2He) reaction

2003-12-20

arxiv.org/abs/quant-ph/0312173v1

J. Phys. A: Math. Gen. 37, 2004, 2777-2780

Physics

Quantum Physics

6 pages, to appear in J. Phys. A

Scientific paper

10.1088/0305-4470/37/7/018

In this note we discuss the effect of the unpolarized state in the spin-correlation measurement of the $^1S_0$ two-proton state produced in 12C(d,2He) reaction at the KVI, Groningen. We show that in the presence of the unpolarized state the maximal violation of the CHSH-Bell inequality is lower than the classical limit if the purity of the state is less than $ \sim \verb+70%+$. In particular, for the KVI experiment the violation of the CHSH-Bell inequality should be corrected by a factor $\sim\verb+10%+$ from the pure $^1S_0$ state.

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