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

POSTER

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: arXiv:1001.0968]

Authors

  • Alexey Gorshkov

    • Harvard University

  • Johannes Otterbach

    • TU Kaiserslautern
    • Technische Universitat Kaiserslautern

  • Eugene Demler

    • Physics Department, Harvard University, Cambridge-MA, 20138
    • Physics Department, Harvard University, Cambridge-MA, 20138.
    • Harvard University

  • Michael Fleischhauer

    • Department of Physics and Research Center OPTIMAS, TU Kaiserslautern, Germany
    • TU Kaiserslautern
    • Technische Universitat Kaiserslautern

  • Mikhail Lukin

    • Harvard, ITAMP
    • Harvard Physics Dpt, CUA
    • Physics Dept., Harvard U.
    • Harvard University
    • Physics Department, Harvard University, Cambridge-MA, 20138
    • Physics Department, Harvard University, Cambridge-MA, 20138.