Keeping the photon in the dark: A new method for full control of quantum dots

Excitons—bound pairs of electrons and an electron hole—are quasiparticles that tin originate successful solids. While alleged "bright" excitons emit airy and are truthful accessible, acheronian excitons are optically inactive. As a result, they person a importantly longer lifetime—which makes them perfect for storing and controlling quantum states and utilizing them for precocious methods to make entanglement.