Fourier's Law confirmed for a class of small quantum systems
  Within the Lindblad formalism we consider an interacting spin chain coupled locally to heat baths. We investigate the dependence of the energy transport on the type of interaction in the system as well as on the overall interaction strength. For a large class of couplings we find a normal heat conduction and confirm Fourier's Law. In a fully quantum mechanical approach linear transport behavior appears to be generic even for small quantum systems. 
Mathias Michel, Michael Hartmann, Jochen Gemmer, Guenter Mahler