The "Tunneling Two-Level Systems" Model of the Low-Temperature Properties of Glasses: Are "Smoking-Gun" Tests Possible?

Abstract

Following a brief review of the "two-level (tunneling) systems" model of the low-temperature properties of amorphous solids ("glasses"), we ask whether it is in fact the unique explanation of these properties as is usually assumed, concluding that this is not necessarily the case. We point out that (a) one specific form of the model is already experimentally refuted, and (b) that a definitive test of the model in its most general form, while not yet carried out, would appear to be now experimentally feasible.

References in corpus (2)

• Temperature Dependence of the Frequency and Noise of Superconducting Coplanar Waveguide Resonators
• Universal Sound Absorption in Amorphous Solids: A Theory of Elastically Coupled Generic Blocks

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