Abstract： In the framework of Green's function theory out of equilibrium, a Landauer--Buttiker (LB) formula for thermal conductance is derived. A simplified model for describing extremely cold dielectric chains is proposed for the first time. Further we apply the present LB formula for studying thermal conductance at low-lying modes, emerging in dielectric atom chains. We find that quantum thermal conductance undergoes an anomalous transition due to new quasiparticle excitations, resulting from nonlinear atom--atom interactions. This theoretical prediction is in excellent agreement with a high-accuracy measurement to thermal conductance quantum.
LIU Hui-Ping;YI Lin. Quantum Thermal Transport through Extremely Cold Dielectric Chains[J]. 中国物理快报, 2006, 23(12): 3194-3197.
LIU Hui-Ping, YI Lin. Quantum Thermal Transport through Extremely Cold Dielectric Chains. Chin. Phys. Lett., 2006, 23(12): 3194-3197.
2006, Vol. 23 
