ECAMP 15

Exciton-polaritons in 2D semiconductor heterostructures provide an ideal platform for exploring novel properties of strongly coupled light-matter quantum fluids. Recently, significant efforts have been dedicated to investigating beyond mean-field effects, with the long-term goal of entering the regime of quantum polaritonics. This presentation focuses on spinor polariton condensates, where, analogous to binary Bose mixtures in ultracold atomic systems, a bipolariton Feshbach resonance enables the realisation and study of beyond mean-field effects across various regimes—from the Bose polaron regime to the regime of self-bound polariton droplets, stabilized by a balance between mean-field interactions and quantum fluctuations.