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NMR analog of Bell’s inequalities violation test

By A. M. Souza, A. Magalhães, J. Teles, E. R. Deazevedo, T. J. Bonagamba, I. S. Oliveira and R. S. Sarthour


Abstract. In this paper we present an analog of the Bell’s inequalities violation test for N qubits to be performed in a nuclear magnetic resonance (NMR) quantum computer. This can be used to simulate or predict results for different Bell’s inequalities tests, with distinct configurations and larger number of qubits. To demonstrate our scheme, we implemented a simulation of the violation of Clauser, Horne, Shimony and Holt (CHSH) inequality using a two qubit NMR system and compared the results to those of a photon experiment. The experimental results are well described by Quantum Mechanics theory and a Local Realistic Hidden Variables model which was specially developed for NMR. That is why we refer to this experiment as a simulation of the Bell’s inequality violation. Our result shows explicitly how both theories can be compatible to each other due the detection loophole. In the last part of this work we discuss the possibility of testing fundamental features of quantum mechanics using NMR with highly polarized spins, where a strong discrepancy between quantum mechanics and hidden variables models can be expected. NMR analog of Bell’s inequalities violation test 2 1

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