Preliminary analysis of a recent experiment by F. A. Bovino(2)

An analysis is made of the results of a recent polarization correlation experiment by Bovino (unpublished) where about 60,000 data have been obtained. I assume that the state of the photon pairs produced in the source (a non-linear crystal) are in a (sligh

IntheBovinoexperimentthedetectione ciencyofphotoncountershasbeen55%andtheoveralle ciencyabout17%[6].Thus,assuminglossesoforder15%in lters[7],Imayestimatethatthereisacollectione ciency(“e ective bercouplingcoe cients”)about36%.Bovinousedtwo-channelpolarizersandhehasrecordedahugeamountofdatawhichcorrespondto4coincidenceratesand4singleratesfor45anglesofAlice´spolarizerscombinedeachwith45anglesofBob´spolarizers.

Intheidealcasequantummechanicspredictsforthecoincidencerates,R12,asafunctionoftheangle,φ,betweenAlice´sandBob´spolarizers,acosinuscurveoftheform

QR12(φj)= R12 [1+Vcos(2φ)],(1)

exp(φj),withthispredictionThedisagreementoftheexperimentaldata,R12maybemeasuredbythequantity

=

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