2018/09/08 by Daniele Faccio, E. M. Wright, Ewan M. Wright · 1 citation
Engineering · Physics and Astronomy · #Acoustic Wave Phenomena Research #Atomic physics #Computer science #Experimental and Theoretical Physics Studies #Orbital Angular Momentum in Optics #Physics #Rotation (mathematics) #physics.class-ph
paper · pdf · doi:10.1103/physrevlett.123.044301
published as Phys. Rev. Lett. 123, 044301 (2019)
arxiv created 2018/09/08 · openalex publication_date 2019/07/23 · arxiv updated 2019/07/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Superradiant gain is the process in which waves are amplified via their interaction with a rotating body, examples including the evaporation of a spinning black hole and electromagnetic emission from a rotating metal sphere. In this Letter we elucidate how superradiance may be realized experimentally in the field of acoustics, and predict the possibility of nonreciprocally amplifying or absorbing acoustic beams carrying orbital angular momentum by propagating them through an absorbing medium that is rotating. We discuss a possible geometry for realizing acoustic superradiant amplification using existing technology.