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Origin of the Thermal Radiation in a Solid-State Analog of a Black-Hole

B. Reznik

gr-qcarXiv:gr-qc/9703076

Abstract

An effective black-hole-like horizon occurs, for electromagnetic waves in matter, at a surface of singular electric and magnetic permeabilities. In a physical dispersive medium this horizon disappears for wave numbers with k>kc. Nevertheless, it is shown that Hawking radiation is still emitted if free field modes with k>kc are in their ground state.

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