Optica Quantum August Issue (IMAGE) Optica Caption Depiction of quantum levitation exploiting the nonequilibrium Casimir force. A modestly biased semiconductor creates modes that exert a repulsive force on a nearby surface. This force overcomes the attractive equilibrium Casimir force contribution at submicron distances. See Spreng et al., pp. 266–273. Credit Optica Quantum Usage Restrictions None License Original 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.