Bell's inequalities,multiphoton states and phase space distributions |
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Institution: | 1. Department of Mathematics and Physics, Roma Tre University, Largo San Leonardo Murialdo, 1 – 00146, Rome, Italy;2. International Telematic University UniNettuno, Corso Vittorio Emanuele II, 39 – 00186, Rome, Italy |
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Abstract: | The connection between quantum optical nonclassicality and the violation of Bell's inequalities is explored. Bell type inequalities for the electromagnetic field are formulated for general states (arbitrary number or photons, pure or mixed) of quantised radiation and their violation is connected to other nonclassical properties of the field. Classical states are shown to obey these inequalities and for the family of centered Gaussian states the direct connection between violation of Bell-type inequalities and squeezing is established. |
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