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

S Hamieh

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In this paper we discuss the effect of the unpolarized state in the spin-correlation measurement of the 1S0 two-proton state produced in the 12C(d, 2He) reaction at the Kernfysisch Versneller Instituut (KVI), Groningen. We show that in the presence of the unpolarized state the maximal violation of the Clauser, Horne, Shimony and Holth (CHSH)–Bell inequality is lower than the classical limit if the purity of the state is less than ~70%. In particular, for the KVI experiment the violation of the CHSH–Bell inequality should be corrected by a factor of ~10% from the pure 1S0 state.


PACS

03.65.Ud Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)

25.45.-z 2H-induced reactions

21.10.Hw Spin, parity, and isobaric spin

27.20.+n 6(less-than-or-equal-to)A(less-than-or-equal-to)19

03.67.Mn Entanglement measures, witnesses, and other characterizations

MSC

81V35 Nuclear physics

Subjects

Computational physics

Nuclear physics

Quantum information and quantum mechanics

Dates

Issue 7 (20 February 2004)

Received 27 October 2003

Published 4 February 2004



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