localized but collective LEEs - P
LEEs - low-energy excitations - more general name than TLSs
- collective and universal
therefore quantum statistics!
collective game is qualitatively different from original individual game - microscopic origin is UNimportant if excitations are collective
- but localized
therefore different from delocalized critical modes around phase transitions
- QLTG - quantum low-temperature glasses
SNS is strongly noncrystalline solid
the definition of the consonance between glassons-fermions and phonons-bosons
phonon (cs) parameters, fermion parameters (mgl, Fermi velocity vF, etc.), and their coupling λgl−ph are self-consistent.
This structural consistency leads to universality of dimensionless sound friction Q−1