Non-local geometric phase in two-photon interferometry

We report the experimental observation of the non-local geometric phase in Hanbury Brown-Twiss polarized intensity interferometry. The experiment involves two independent, polarized, incoherent sources, illuminating two polarized detectors. Varying the relative polarization angle between the detecto...

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Bibliographic Details
Published in:Europhysics letters 2012-01, Vol.97 (1), p.10003
Main Authors: Martin, A, Alibart, O, Flesch, J.-C, Samuel, J, Sinha, Supurna, Tanzilli, S, Kastberg, A
Format: Article
Language:English
Subjects:
03.65.Vf
42.50.-p
42.50.Ar
Physics
Quantum Physics
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Summary:We report the experimental observation of the non-local geometric phase in Hanbury Brown-Twiss polarized intensity interferometry. The experiment involves two independent, polarized, incoherent sources, illuminating two polarized detectors. Varying the relative polarization angle between the detectors introduces a geometric phase equal to half the solid angle on the Poincaré sphere traced out by a pair of single photons. Local measurements at either detector do not reveal the effect of the geometric phase, which appears only in the coincidence counts between the two detectors, showing a genuinely non-local effect. We show experimentally that coincidence rates of photon arrival times at separated detectors can be controlled by the two-photon geometric phase. This effect can be used for manipulating and controlling photonic entanglement.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/97/10003