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arXiv:cond-mat/0503255 · Physical Review Letters

Solid-State Circuit for Spin Entanglement Generation and Purification

Jacob M. Taylor, Wolfgang Dür, P. Zoller, Amir Yacoby, Charles M. Marcus, Mikhail D. Lukin

Published Jun 15, 2005• 56 citations
arXivHTMLPDF

Abstract

We show how realistic charge manipulation and measurement techniques, combined with the exchange interaction, allow for the robust generation and purification of four-particle spin entangled states in electrically controlled semiconductor quantum dots. The generated states are immunized to the dominant sources of noise via a dynamical decoherence-free subspace; all additional errors are corrected by a purification protocol. This approach may find application in quantum computation, communication, and metrology.

DOI
10.1103/physrevlett.94.236803

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