QSNS - smoking guns - P

QSNS= Quantum Strongly-Noncrystalline Solids

QSNS not equal to Amorphous Solids, not equal to Glasses

Vural-Leggett 2011-2013

Universal Sound Absorption in Amorphous Solids: A Theory of Elastically Coupled Generic Blocks
Dervis C. Vural, Anthony J. Leggett

Vural's thesis

• 2013 Is TTLS model successful because it is unique, or because it is a special case of a much more general scenario?

universal value of Q-1 due to fact that absorbed entity (phonon) identical to one whose exchange generates effective interaction.
Small value of Q-1 a result of (a) multiplicity of phonon modes and stress-tensor matrix elements (b) logarithmic factor arising from real-space scaling

“Smoking – gun” tests? - Problem: alternative scenario at present too generic to make many specific predictions

resonant scattering

2013 The "Tunneling Two-Level Systems" Model of the Low-Temperature Properties of Glasses: Are "Smoking-Gun" Tests Possible? Authors: Anthony James Leggett, Dervis Can Vural

compare with the derivation of resonant scattering
1972 Jackle - relaxation regime and resonant regimes
1971 Anomalous Low-temperature Thermal Properties of Glasses and Spin Glasses By P. w. ANDERSON, B. I. HALPERIN and c. M. VARMA

Yu-Leggett 1991

• Leggett 1991

2015 A Generic Microscopic Theory for the Universality of TTLS Model Meissner-Berret Ratio in Low-Temperature Glasses Di Zhou published pdf , Anthony J. Leggett

Shukla γl and γt as the coupling-strength for two amorphous molecules mediated by longitudinal and transverse phonons (also referred as Meissner-Berret ratio)

• 2016 Random Nonlinear Infinite-Level-System Model for Amorphous Solid Phonon Echo and Saturation Phenomena
  Di Zhou, Anthony J. Leggett

• Zhou thesis

addendum

2018 - Enss