Photonic Phase Gate via an Exchange of Fermionic Spin Waves in a Spin Chain

ORAL

Abstract

We propose a new protocol for implementing the two-qubit photonic phase gate. In our approach, the $\pi$ phase is acquired by mapping two single photons into atomic excitations with fermionic character and exchanging their positions. The fermionic excitations are realized as spin waves in a spin chain, while photon storage techniques provide the interface between the photons and the spin waves. Possible imperfections and experimental systems suitable for implementing the gate are discussed. [Reference: Phys. Rev. Lett. 105, 060502 (2010)]

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Authors

  • Alexey Gorshkov

    California Institute of Technology, California Institute of Technology, USA

  • Johannes Otterbach

    Universitat Kaiserslautern, Germany

  • Eugene Demler

    Harvard University, Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA, Harvard University, USA

  • Michael Fleischhauer

    Fachbereich Physik und Forschungszentrum OPTIMAS, Technische Universitaet Kaiserslautern, D-67663 Kaiserslautern, Germany, Universitat Kaiserslautern, Germany

  • Mikhail Lukin

    Harvard University, USA