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    Superradiant Amplification of Acoustic Beams via Medium Rotation

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    PhysRevLett.123.044301(1).pdf
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    Author
    Faccio, D.
    Wright, E. M.
    Affiliation
    Univ Arizona, Coll Opt Sci
    Issue Date
    2019-07-23
    
    Metadata
    Show full item record
    Publisher
    AMER PHYSICAL SOC
    Citation
    Faccio, D., & Wright, E. M. (2019). Superradiant amplification of acoustic beams via medium rotation. Physical review letters, 123(4), 044301.
    Journal
    PHYSICAL REVIEW LETTERS
    Rights
    Copyright © 2019 American Physical Society.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    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.
    ISSN
    0031-9007
    DOI
    10.1103/physrevlett.123.044301
    Version
    Final published version
    Sponsors
    EPSRC (U.K.) [EP/P006078/2]
    ae974a485f413a2113503eed53cd6c53
    10.1103/physrevlett.123.044301
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