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.