Solid-State Circuit for Spin Entanglement Generation and Purification

J. M. Taylor, W. Dür, P. Zoller, A. Yacoby, C. M. Marcus, and M. D. Lukin
Phys. Rev. Lett. 94, 236803 – Published 15 June 2005

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.

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  • Received 10 March 2005

DOI:https://doi.org/10.1103/PhysRevLett.94.236803

©2005 American Physical Society

Authors & Affiliations

J. M. Taylor1, W. Dür2,3, P. Zoller2,3, A. Yacoby1,4, C. M. Marcus1, and M. D. Lukin1

  • 1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
  • 2Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
  • 3Institut für Quantenoptik und Quanteninformation der Österreichischen Akademie der Wissenschaften, Innsbruck, Austria
  • 4Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel

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Issue

Vol. 94, Iss. 23 — 17 June 2005

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