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.

Close

PrevNext

View figure in article

• Exciton polariton
• Optical coherence
• Optical lattices & traps
• Spin coherence
• Polariton condensate
• Quantum wells
• Spinor Bose-Einstein condensates
• Interferometry
• Laser techniques