Work

Spectrum and entanglement of phonons in quantum fluids of light

Year: 2014

Type: article

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.

Source: Physical Review A

DOI: 10.1103/physreva.89.043819

Authors: Xavier Busch, Iacopo Carusotto, Renaud Parentani

Institutions: Université Paris-Sud, Centre National de la Recherche Scientifique, Laboratoire de Physique Théorique d’Orsay, University of Trento

Language: English

Topic: Strong Light-Matter Interactions

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Agence Nationale de la Recherche, Provincia Autonoma di Trento

Award: Idex Paris-Saclay