title: Heat transfer in the spin-boson model: a comparative study in the incoherent tunneling regime.
abstract: We study the transfer of heat in the nonequilibrium spin-boson model with an Ohmic dissipation. In the nonadiabatic limit we derive a formula for the thermal conductance based on a rate equation formalism at the level of the noninteracting blip approximation, valid for temperatures T>T(K), with T(K) as the Kondo temperature. We evaluate this expression analytically assuming either weak or strong couplings, and demonstrate that our results agree with exact relations. Far-from-equilibrium situations are further examined, showing a close correspondence to the linear response limit.
authors.affiliation: Chemical Physics Theory Group, Department of Chemistry, University of Toronto, 80 Saint George St. Toronto, Ontario, Canada M5S 3H6.
authors.forename: Dvira
authors.initials: D
authors.lastname: Segal
mesh_terms: D006358:Hot Temperature; D008962:Models, Theoretical