Electron teleportation between quantum dots using virtual dark exciton

Abstract

We here propose a mechanism to teleport electrons between quantum dots throughthe transformation of a virtual bright exciton into a dark exciton. Thismechanism relies on the interactions of two composite bosons: a pair ofelectrons with opposite spins, trapped in two dots and an electron-hole pair ina free exciton coupled to an unabsorbed pump pulse, which makes it “bright”but virtual. This bright exciton first turns “dark” by dropping its electronand stealing the trapped electron with opposite spin through an exchange Coulombprocess with the trapped pair. In a second step, the dark exciton “flies” withits electron to the other dot where it turns bright again, by the inverse process.The “Shiva diagrams” for composite-boson many-body effects that wehave recently introduced, enlighten this understanding.