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  • All-electrical coherent control of the exciton states in a single quantum dot

    Author(s)
    de la Giroday, A Boyer
    Bennett, AJ
    Pooley, MA
    Stevenson, RM
    Skoeld, N
    Patel, RB
    Farrer, I
    Ritchie, DA
    Shields, AJ
    Griffith University Author(s)
    Patel, Raj B.
    Year published
    2010
    Metadata
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    Abstract
    We demonstrate high-fidelity reversible transfer of quantum information from the polarization of photons into the spin state of an electron-hole pair in a semiconductor quantum dot. Moreover, spins are electrically manipulated on a subnanosecond time scale, allowing us to coherently control their evolution. By varying the area of the electrical pulse, we demonstrate phase-shift and spin-flip gate operations with near-unity fidelities. Our system constitutes a controllable quantum interface between flying and stationary qubits, an enabling technology for quantum logic in the solid state.We demonstrate high-fidelity reversible transfer of quantum information from the polarization of photons into the spin state of an electron-hole pair in a semiconductor quantum dot. Moreover, spins are electrically manipulated on a subnanosecond time scale, allowing us to coherently control their evolution. By varying the area of the electrical pulse, we demonstrate phase-shift and spin-flip gate operations with near-unity fidelities. Our system constitutes a controllable quantum interface between flying and stationary qubits, an enabling technology for quantum logic in the solid state.
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    Journal Title
    Physical review. B, Condensed matter and materials physics
    Volume
    82
    Issue
    24
    DOI
    https://doi.org/10.1103/PhysRevB.82.241301
    Subject
    Physical Sciences not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/62115
    Collection
    • Journal articles

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