Giant optical Faraday rotation induced by a single-electron spin in a quantum dot: applications to entangling remote spins via a single photon

C Hu, AB Young, JL O'Brien, JG Rarity

Research output: Contribution to journalArticle (Academic Journal)peer-review

267 Citations (Scopus)

Abstract

We propose a quantum nondemolition method-a giant optical Faraday rotation near the resonant regime to measure a single-electron spin in a quantum dot inside a microcavity where a negatively charged exciton strongly couples to the cavity mode. Left-circularly and right-circularly polarized lights reflected from the cavity obtain different phase shifts due to cavity quantum electrodynamics and the optical spin selection rule. This yields giant and tunable Faraday rotation that can be easily detected experimentally. Based on this spin-detection technique, a deterministic photon-spin entangling gate and a scalable scheme to create remote spin entanglement via a single photon are proposed.
Translated title of the contributionGiant optical Faraday rotation induced by a single-electron spin in a quantum dot: applications to entangling remote spins via a single photon
Original languageEnglish
Pages (from-to)085307-1 - 085307-5
Number of pages5
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume78
Issue number085307
DOIs
Publication statusPublished - Aug 2008

Bibliographical note

Publisher: American Physical Society

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