The Nonlocal Pancharatnam Phase in Two-Photon Interferometry
Poonam Mehta, Joseph Samuel, Supurna Sinha
TL;DR
This paper proposes an experiment to measure a nonlocal geometric phase in two-photon interferometry, revealing quantum effects related to entanglement and the multiparticle Aharonov-Bohm effect.
Contribution
It introduces a novel polarised intensity interferometry setup to observe the nonlocal Pancharatnam phase in two-photon systems.
Findings
Detection of a nonlocal geometric phase in two-photon interferometry
Local measurements do not reveal the phase effects
Potential implications for understanding entanglement and quantum interference
Abstract
We propose a polarised intensity interferometry experiment, which measures the nonlocal Pancharatnam phase acquired by a pair of Hanbury Brown-Twiss photons. The setup involves two polarised thermal sources illuminating two polarised detectors. Varying the relative polarisation angle of the detectors introduces a two photon geometric phase. Local measurements at either detector do not reveal the effects of the phase, which is an optical analog of the multiparticle Aharonov-Bohm effect. The geometric phase sheds light on the three slit experiment and suggests ways of tuning entanglement.
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