Abstract

Sonoluminescence, a resonant cavitation of the gas/liquid interface with the kHz ultrasound, produces visible light and splitting of water. According to the quantum vacuum radiation model of sonoluminescence, high- $Q$ resonant radio frequency (rf) or microwave cavity with movable walls should produce similar effects. The similarity of the effects of highly resonant nonthermal rf described in this Letter and sonoluminescence suggests that quantum vacuum radiation might indeed be the most feasible model to explain both phenomena.

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