Felix Izrailev — Universidad Autónoma de Puebla #
Recovery of normal heat conduction in harmonic chains with correlated disorder #
We consider heat transport in one-dimensional harmonic chains with isotopic disorder, focusing our 
attention on how disorder correlations affect heat conduction. Our approach reveals that long-range 
correlations can change the number of low-frequency extended states. As a result, with a proper choice of 
correlations one can control how the conductivity scales with the chain length \(N\). We present a detailed 
analysis of the role of specific long-range correlations for which a size-independent conductivity is 
exactly recovered in the case of fixed boundary conditions. As for free boundary conditions, we show that 
disorder correlations can lead to a conductivity slowly dependent on \(N\), so that normal conduction is 
almost recovered even in this case.