Bose-Einstein Condensation of Polaritons (IMAGE) Ecole Polytechnique Fédérale de Lausanne Caption Images of the energy distribution of polaritons as a function of the excitation density. From left to right, below threshold for condensation, at threshold and above threshold. Front row, speed distributions, the speed increases from the center to the edges. Rear row, dispersion of polaritons, with their distribution. Credit Benoit Devead-Pledran, EPFL Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.