The thermal conductance for the energy transport through a disordered harmonic chain is calculated by a tunneling expression of the energy current. The dominant contribution comes from quasiballistic phonons for which the localization length is comparable to the size of the chain. A universal regime of conductance in kB²T/{} is obtained at low temperature, while giant fluctuations are predicted at higher temperature. Analogies with electrical conductance are established and conditions for measurements are discussed.
No takes yet. Share an insight, caveat, or question.
Maynard et al. (1985) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: