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 (nonadiabatic) 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 behavior of the dielectric constant.
Sonoluminescence: Bogolubov coefficients for the QED vacuum of a time-dependent dielectric bubble
Liberati, Stefano;
1999-01-01
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 (nonadiabatic) 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 behavior of the dielectric constant.File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
sono.pdf
non disponibili
Licenza:
Non specificato
Dimensione
64.3 kB
Formato
Adobe PDF
|
64.3 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
