Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 21, Pages 4418-4421Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.4418
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Tests of local realism versus quantum mechanics based on Bell's inequality employ two entangled qubits. We investigate the general case of two entangled quantum systems defined in N-dimensional Hilbert spaces, or quNits. Via a numerical linear optimization method we show that violations of local realism are stronger for two maximally entangled quNits (3 less than or equal to N less than or equal to 9) than for two qubits and that they increase with N. The two quNit measurements can be experimentally realized using entangled photons and unbiased multiport beam splitters.
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