ANOMALOUS THERMAL TRANSPORT IN QUANTUM WIRES

We study thermal transport in a one-dimensional quantum wire connected to reservoirs. Despite the absence of electron backscattering, interactions in the wire strongly influence thermal transport. Electrons propagate with unitary transmission through the wire and electric conductance is not affected. Energy, however, is carried by bosonic excitations (plasmons) which suffer from scattering even on scales much larger than the Fermi wavelength. If the electron density varies randomly, plasmons are localized and charge-energy separation occurs. We also discuss the effect of plasmon-plasmon interaction using Levinson's theory of nonlocal heat transport.