Phase transitions of light in a dye-filled microcavity: observations and simulations

Photon thermalisation and condensation in dye-filled microcavities is a growing area of scientific interest, at the intersection photonics, quantum optics statistical physics. We give here short introduction to topic, together with an explanation some our more important recent results. A key result across several projects that we have model based on detailed physical description which has been used accurately describe experimental observations. present new open-source package Python called PyPBEC implements this model. The aim enable reader readily simulate explore physics photon condensates themselves, so article also includes working example code can be downloaded from GitHub repository.