Observation of the Bogoliubov Dispersion in a Fluid of Light.
Quentin Fontaine,Tom Bienaimé,Simon Pigeon,Elisabeth Giacobino,Alberto Bramati,Quentin Glorieux +5 more
TLDR
This Letter proposes and implements a general method for measuring the excitations spectrum in a fluid of light, based on a group velocity measurement and observes a Bogoliubov-like dispersion with a speed of sound scaling as the square root of the fluid density.Abstract:
Quantum fluids of light are a photonic counterpart to atomic Bose gases and are attracting increasing interest for probing many-body physics quantum phenomena such as superfluidity. Two different configurations are commonly used: the confined geometry where a nonlinear material is fixed inside an optical cavity and the propagating geometry where the propagation direction plays the role of an effective time for the system. The observation of the dispersion relation for elementary excitations in a photon fluid has proved to be a difficult task in both configurations with few experimental realizations. Here, we propose and implement a general method for measuring the excitations spectrum in a fluid of light, based on a group velocity measurement. We observe a Bogoliubov-like dispersion with a speed of sound scaling as the square root of the fluid density. This Letter demonstrates that a nonlinear system based on an atomic vapor pumped near resonance is a versatile and highly tunable platform to study quantum fluids of light.read more
Citations
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Dispersion relation of the collective excitations in a resonantly driven polariton fluid.
Petr Stepanov,Ivan Amelio,J.-G. Rousset,J.-G. Rousset,Jacqueline Bloch,Aristide Lemaître,Alberto Amo,Anna Minguzzi,Iacopo Carusotto,Maxime Richard +9 more
TL;DR: This work demonstrates that the presence of an excitonic reservoir alongside the polariton condensate has a dramatic influence on the characteristics of the quantum fluid, and clarifies the role of such a reservoir in polariton quantum hydrodynamics.
Journal ArticleDOI
Polariton fluids for analogue gravity physics
Maxime Jacquet,T. Boulier,Ferdinand Claude,Anne Maître,Emiliano Cancellieri,C. Adrados,Alberto Amo,Simon Pigeon,Quentin Glorieux,Alberto Bramati,Elisabeth Giacobino +10 more
TL;DR: It is demonstrated how optically generating a defect in a polariton microcavity enables the creation of one- and two-dimensional, transsonic fluid flows and it is shown that this highly tuneable method permits thecreation of horizons.
Journal ArticleDOI
Wave condensation with weak disorder versus beam self-cleaning in multimode fibers
Josselin Garnier,Adrien Fusaro,K. Baudin,Claire Michel,Katarzyna Krupa,Guy Millot,Guy Millot,Antonio Picozzi +7 more
TL;DR: In this article, the authors studied the effect of wave condensation on beam self-cleaning in a graded-index multimode optical fiber (MMF) and showed that a model where the modes experience partially correlated noise is sufficient to accelerate the thermalization, whereas a fully mode-correlated noise does not lead to a dissipation-induced acceleration of condensation.
Journal ArticleDOI
Analytical description of quantum emission in optical analogs to gravity
TL;DR: In this article, the authors consider a moving refractive index perturbation in an optical medium as an optical analog to waves under the influence of gravity and describe the dielectric medium by the Lagrangian of the Hopfield model.
Posted Content
Analogue cosmological particle creation in an ultracold quantum fluid of light
Jeff Steinhauer,Murad Abuzarli,Tangui Aladjidi,Tom Bienaimé,Clara Piekarski,Wei Liu,Elisabeth Giacobino,Alberto Bramati,Quentin Glorieux +8 more
TL;DR: In the early universe, the spontaneous creation of cosmological particles from vacuum fluctuations, observable today in the cosmic microwave background anisotropies, was studied in this article, using a quenched 3-dimensional quantum fluid of light.
References
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Journal ArticleDOI
Bose-Einstein condensation of exciton polaritons
Jacek Kasprzak,Maxime Richard,S. Kundermann,A. Baas,P. Jeambrun,Jonathan Keeling,Francesca Maria Marchetti,Marzena H. Szymańska,Régis André,Jl Staehli,Vincenzo Savona,Peter B. Littlewood,Benoit Deveaud,Le Si Dang +13 more
TL;DR: A comprehensive set of experiments giving compelling evidence for BEC of polaritons of bosonic quasi-particles are detailed, which indicate the spontaneous onset of a macroscopic quantum phase.
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Bose-Einstein Condensation of Microcavity Polaritons in a Trap
Ryan Balili,V. Hartwell,V. Hartwell,David W. Snoke,David W. Snoke,L. Pfeiffer,L. Pfeiffer,Kenneth D. West,Kenneth D. West +8 more
TL;DR: Polaritons are created in a harmonic potential trap analogous to atoms in optical traps and observe a number of signatures of Bose-Einstein condensation: spectral and spatial narrowing, a peak at zero momentum in the momentum distribution, first-order coherence, and spontaneous linear polarization of the light emission.
Journal ArticleDOI
Superfluidity of polaritons in semiconductor microcavities
Alberto Amo,Jérôme Lefrère,Simon Pigeon,C. Adrados,Cristiano Ciuti,Iacopo Carusotto,Romuald Houdré,Elisabeth Giacobino,Alberto Bramati +8 more
TL;DR: In this article, the existence of superfluidity in polaritons is investigated in terms of the Landau criterion and manifests itself as the suppression of scattering from defects when the flow velocity is slower than the speed of sound in the fluid.
Journal ArticleDOI
Viscosity of Liquid Helium below the λ-Point
TL;DR: In this paper, the authors showed that there is a drop in viscosity below the λ-point by a factor of 3 compared with liquid helium at normal pressure, and a difference of 8 compared with the value just above the point of interest.
Journal ArticleDOI
Exciton–polariton condensates
TL;DR: A review of the physical properties of exciton-polariton condensates can be found in this article, where the authors examine topics such as the difference between polariton BEC, a polariton laser and a photon laser.