Fast, high fidelity, single-shot quantum non-demolition measurement of a quantum dot electron spin using cavity exciton-polariton resonance

摘要

We propose a novel scheme for a single-shot, fast (10s of nanoseconds), high fidelity (99.95%) quantum non-demolition (QND) readout of quantum dot (QD) electron spins based on their spin-dependent Coulomb exchange interaction with optically-excited quantum well (QW) microcavity exciton-polaritons.