Spectrum and entanglement of phonons in quantum fluids of light

Xavier Busch, Iacopo Carusotto, and Renaud Parentani
Phys. Rev. A 89, 043819 – Published 14 April 2014

Abstract

We study the quantum state of phonons propagating on top of a fluid of light coherently generated in a planar microcavity device by a quasiresonant incident laser beam. In the steady state under a monochromatic pump, because of the finite radiative lifetime of photons, a sizable incoherent population of low-frequency phonons is predicted to appear. Their mean occupation number differs from a Planck distribution and is independent of the photon lifetime. When the photon fluid is subjected to a sudden change of its parameters, additional phonon pairs are created in the fluid with remarkable two-mode squeezing and entanglement properties. Schemes to assess the nonseparability of the phonon state from measurements of the correlation functions of the emitted light are discussed.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
2 More
  • Received 20 November 2013

DOI:https://doi.org/10.1103/PhysRevA.89.043819

©2014 American Physical Society

Authors & Affiliations

Xavier Busch1,*, Iacopo Carusotto2,†, and Renaud Parentani1,‡

  • 1Laboratoire de Physique Théorique, CNRS UMR 8627, Bâtiment 210, Université Paris-Sud 11, 91405 Orsay CEDEX, France
  • 2INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, via Sommarive 14, 38123 Povo, Italy

  • *xavier.busch@th.u-psud.fr
  • carusott@science.unitn.it
  • renaud.parentani@th.u-psud.fr

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 89, Iss. 4 — April 2014

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×