Superradiant scattering in fluids of light
Authors: Prain A., Maitland C., Faccio D., Marino F.
Autors Affiliation: Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom; School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom; CNR-Istituto Nazionale di Ottica I-50019 Sesto Fiorentino (FI), Italy; INFN, Sez. di Firenze, I-50019 Sesto Fiorentino (FI), Italy.
Abstract: We investigate the scattering process of Bogoliubov excitations on a rotating photon fluid. Using the language of Noether currents we demonstrate the occurrence of a resonant amplification phenomenon, which reduces to the standard superradiance in the hydrodynamic limit. We make use of a time-domain formulation where superradiance emerges as a transient effect encoded in the amplitudes and phases of propagating localized wave packets. Our findings generalize previous studies in quantum fluids to the case of a non-negligible quantum pressure and can be readily applied also to other physical systems, in particular atomic Bose-Einstein condensates. Finally we discuss ongoing experiments to observe superradiance in photon fluids and how our time domain analysis can be used to characterize superradiant scattering in nonideal experimental conditions.
Journal/Review: PHYSICAL REVIEW D
Volume: 100 (2) Pages from: 024037-1 to: 024037-11
KeyWords: Fluids of light, analogue gravity modelsDOI: 10.1103/PhysRevD.100.024037Citations: 7data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-02-28References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here