Hong-Ou-Mandel interferometry with trapped polariton condensates

TL;DR

This paper explores the quantum interference of polaritons in trapped Bose-Einstein condensates using Hong-Ou-Mandel interferometry, revealing how polarization affects indistinguishability and interference patterns.

Contribution

It demonstrates the behavior of polariton interference under different polarization regimes and introduces the observation of HOM-dip revival at spinor Larmor precession frequency.

Findings

HOM-dip follows condensate coherence time in circular polarization

Linearly polarized condensates show polariton bunching and interference

Revival of HOM-dip occurs at spinor Larmor precession frequency

Abstract

We investigate the indistinguishability of polaritons in optically trapped Bose Einstein condensates by implementing Hong-Ou-Mandel (HOM) interferometry and test the limitations of two-polariton interference in the coherent, limit-cycle and thermal statistical regimes. We observe that the HOM dynamics of a circularly polarized condensate follows the condensate coherence time with the characteristic HOM-dip approaching the classical limit. Linearly polarized condensates exhibit a combined effect of polariton bunching and two-polariton interference. Under elliptically polarized excitation, the temporal evolution of the spinor condensate results in the revival of the HOM-dip at the spinor Larmor precession frequency.