Teleportation of electronic many-qubit states via single photons

摘要

We propose a teleportation scheme that relies only on single-photonmeasurements and Faraday rotation, for teleportation of many-qubit entangledstates stored in the electron spins of a quantum dot system. The interactionbetween a photon and the two electron spins, via Faraday rotation inmicrocavities, establishes Greenberger-Horne-Zeilinger entanglement in thespin-photon-spin system. The appropriate single-qubit measurements, and thecommunication of two classical bits, produce teleportation. This schemeprovides the essential link between spintronic and photonic quantum informationdevices by permitting quantum information to be exchanged between them.