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Sonoluminescence: Bogolubov coefficients for the QED vacuum of a time-dependent dielectric bubble

Matt Visser·S. Liberati·F. Belgiorno·D. W. Sciama
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Abstract

We extend Schwinger's ideas regarding sonoluminescence by explicitly calculating the Bogolubov coefficients relating the QED vacuum states associated with changes in a dielectric bubble. Sudden (non-adiabatic) changes in the refractive index lead to an efficient production of real photons with a broadband spectrum, and a high-frequency cutoff that arises from the asymptotic behaviour of the dielectric constant.

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Matt Visser, S. Liberati, F. Belgiorno, D. W. Sciama. 1999-05-14. Sonoluminescence: Bogolubov coefficients for the QED vacuum of a time-dependent dielectric bubble. https://doi.org/10.1103/physrevlett.83.678

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