Entangled Optical Phonons in Diamond at Room Temperature

ORAL

Abstract

Diamond's many superlative features include a Raman-active optical phonon that is well-isolated from thermal fluctuations at room temperature. We enlist this mode to demonstrate entanglement between two macroscopic, spatially separated diamonds at room temperature with ultrashort pulses and a far-off-resonance Raman interaction. We measured the concurrence of the joint state of the Raman-scattered photons to determine that the optical phonon modes in the two diamonds were entangled. Our results demonstrate that entanglement can persist in the vibrational motion of macroscopic solids at room temperature.

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Authors

  • Michael R. Sprague

    Clarendon Laboratory, University of Oxford

  • Ka Chung Lee

    Clarendon Laboratory, University of Oxford

  • Benjamin J. Sussman

    National Research Council of Canada

  • Joshua Nunn

    Clarendon Laboratory, University of Oxford

  • Nathan K. Langford

    Clarendon Laboratory, University of Oxford

  • Xian-Min Jin

    Clarendon Laboratory, University of Oxford

  • Tessa Champion

    Clarendon Laboratory, University of Oxford

  • Patrick Michelberger

    Clarendon Laboratory, University of Oxford

  • Klaus F. Reim

    Clarendon Laboratory, University of Oxford

  • Duncan G. England

    Clarendon Laboratory, University of Oxford

  • Dieter Jaksch

    Clarendon Laboratory, University of Oxford

  • Ian A. Walmsley

    Clarendon Laboratory, University of Oxford