Fault-tolerant quantum computing with coded spins using the conditional Faraday rotation in quantum dots

    Authors

    M. N. Leuenberger

    Comments

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    Abbreviated Journal Title

    Phys. Rev. B

    Keywords

    ERROR-CORRECTING CODES; COMPUTATION; COHERENCE; UNIVERSAL; DYNAMICS; GATES; Physics, Condensed Matter

    Abstract

    We propose a scalable fault-tolerant scheme for deterministic quantum computing with spins that is based on a three-particle entanglement produced by the conditional Faraday rotation of the polarization of single photons due to the nonresonant interaction with spins of quantum dots, embedded in microcavities inside a photonic crystal. The resulting conditional phase gate yields switching times of 50 ps. We show that it acts fault-tolerantly not only on the Calderbank-Shor-Steane quantum error correction codes, but also on Shor's code in a single shot. Single-qubit operations on Shor's logical qubits can be implemented by means of the optical Stark effect combined with the optical Ruderman-Kittel-Kasuya-Yosida interaction in a single shot.

    Journal Title

    Physical Review B

    Volume

    73

    Issue/Number

    7

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    8

    WOS Identifier

    WOS:000235668900072

    ISSN

    1098-0121

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