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

Authors
Visser, M Liberati, S Belgiorno, F Sciama, DW
Citation
M. Visser et al., Sonoluminescence: Bogolubov coefficients for the QED vacuum of a time-dependent dielectric bubble, PHYS REV L, 83(4), 1999, pp. 678-681
Citations number
15
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
4
Year of publication
1999
Pages
678 - 681
Database
ISI
SICI code
0031-9007(19990726)83:4<678:SBCFTQ>2.0.ZU;2-#
Abstract
We extend Schwinger's ideas regarding sonoluminescence by explicitly calcul ating the Bogolubov coefficients relating the QED vacuum states associated with changes in a dielectric bubble. Sudden (nonadiabatic) changes in the r efractive index lead to an efficient production of real photons with a broa dband spectrum, and a high-frequency cutoff that arises from the asymptotic behavior of the dielectric constant.