Liquid light at room temperature; a possibility with potential to transform the energy sector
https://interestingengineering.com/finding-liquid-light-at-room-temperature
"superfluidity can also occur at room temperature, under ambient conditions, using light-matter particles called polaritons... the photons interact with electron-hole pairs, called excitons, in a semiconductor. These excitons impose a dipole moment, which is combined with the dipole of the EM field, and couples strongly the excitons and the photons. The final result is a polariton, considered a quasiparticle, composed of half-light and half matter. It behaves as a Bose-Einstein condensate [BEC]"
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