Loss-resistant state teleportation and entanglement swapping using a quantum-dot spin in an optical microcavity

C Hu, JG Rarity

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

142 Citations (Scopus)

Abstract

We present schemes for efficient state teleportation and entanglement swapping using a single quantum-dot spin in an optical microcavity based on giant circular birefringence. State teleportation or entanglement swapping is heralded by the sequential detection of two photons and is finished after the spin measurement. The spin-cavity unit works as a complete Bell-state analyzer with a built-in spin memory allowing loss-resistant repeater operation. This device can work in both the weak coupling and the strong coupling regime, but high efficiencies and high fidelities are achievable only when the side leakage and cavity loss is low. We assess the feasibility of this device and show it can be implemented with current technology. We also propose optical spin manipulation methods at single-photon levels, which could be used to preserve the spin coherence via spin echo techniques.
Translated title of the contributionLoss-resistant state teleportation and entanglement swapping using a quantum-dot spin in an optical microcavity
Original languageEnglish
Pages (from-to)115303-1 - 115303-9
Number of pages9
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume83
Issue number115303
DOIs
Publication statusPublished - Mar 2011

Bibliographical note

Publisher: American Physical Society

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