Nonlinear Phonon Propagation in Fused Silica below 1 K

作者：Brage Golding, John E. Graebner, B. I. Halperin, R. J. Schutz · 发表于：Physical Review Letters · 年份：1973 · DOI：10.1103/physrevlett.30.223 · 被引用次数：151 · 研究领域：Glass properties and applications、Photorefractive and Nonlinear Optics、Thermography and Photoacoustic Techniques

Phonon pulse propagation has been studied in fused silica at frequencies between 0.4 and 2.0 GHz for temperatures as low as 0.1 K. An increase in attenuation, observed as the incident acoustic intensity is decreased, is attributed to resonant scattering by two-level "tunneling states" intrinsic to glasses.