Hawking Radiation in Sonic Black Holes

S. Giovanazzi
Phys. Rev. Lett. 94, 061302 – Published 18 February 2005

Abstract

I present a microscopic description of Hawking radiation in sonic black holes. A one-dimensional Fermi-degenerate liquid squeezed by a smooth barrier forms a transonic flow, a sonic analog of a black hole. The quantum treatment of the noninteracting case establishes a close relationship between sonic Hawking radiation and quantum tunneling through the barrier. Quasiparticle excitations appear at the barrier and are then radiated with a thermal distribution in exact agreement with Hawking's formula. The signature of the radiation can be found in the dynamic structure factor, which can be measured in a scattering experiment. The possibility for experimental verification of this new transport phenomenon for ultracold atoms is discussed.

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  • Received 27 October 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.061302

©2005 American Physical Society

Authors & Affiliations

S. Giovanazzi*

  • School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY 16 9SS, United Kingdom

  • *Electronic address: sg51@st-andrews.ac.uk

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Issue

Vol. 94, Iss. 6 — 18 February 2005

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