Classical light analogue of the nonlocal Aharonov-Bohm effect

Abstract

We demonstrate the existence of a non-local geometric phase in the intensity-intensity correlations of classical incoherent light, that is not seen in the lower order correlations. This two-photon Pancharatnam phase was observed and modulated in a Mach-Zehnder interferometer. Using acousto-optic interaction, independent phase noise was introduced to light in the two arms of the interferometer to create two independent incoherent classical sources from laser light. The experiment is the classical optical analogue of the multi-particle Aharonov-Bohm effect. As the trajectory of light over the Poincare sphere introduces a phase shift observable only in the intensity-intensity correlation, it provides a means of deflecting the two-photon wavefront, while having no effect on single photons.

arXiv commentTo appear in Europhys. Lett

References in corpus (3)

• Two-photon "ghost" imaging with thermal light
• Role of entanglement in two-photon imaging
• Multiphoton path entanglement by non-local bunching

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• A classical optical approach to the `non-local Pancharatnam-like phases' in Hanbury-Brown-Twiss correlations
• Quantum Hall realization of polarized intensity interferometry
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