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Violations of local realism by two entangled N-dimensional systems are stronger than for two qubits
Kaszlikowski1, Gnacinski, Zukowski
1Instytut Fizyki Teoretycznej i Astrofizyki Uniwersytet Gdanski, PL-80-952 Gdansk, Poland.
Abstract:
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=N=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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