Reanalysis of experimental determinations of polariton-polariton interactions in microcavities. D. Snoke, V. Hartwell, J. Beaumariage, S. Mukherjee, Y. Yoon, D. Myers, M. Steger, Z. Sun, K. Nelson and L. Pfeiffer in Phys. Rev. B 107:165302 (2023).  What the paper says!?

This page is still in progress.

This is a nice text on polariton interactions, covering at depth various aspects.

This focuses on GaAs/Al$_x$Ga$_{1-x}$As samples.

An argument for the value of interactions is the thermalization: (should critically analyze this claim)

As discussed above, lower values of the interaction strength fail by orders of magnitude to give a thermalization time of the polaritons adequate to form a condensate within their lifetime, because the thermalization rate is proportional to the square of the interaction strength, and therefore drops off rapidly for low values of g.

Measurements when there are coherent extended states, as in BEC, consistently give values of the interaction constant that are lower than the values deduced at low density, and in the range predicted by the theory. In general, the many-body effects of screening and anticorrelation are expected to reduce the effective interaction strength and the blueshift from the nominal value