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Quantum Thermal Transport through Extremely Cold Dielectric Chains |
| LIU Hui-Ping;YI Lin |
| Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
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| Cite this article: |
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LIU Hui-Ping, YI Lin 2006 Chin. Phys. Lett. 23 3194-3197 |
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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.
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| Keywords:
05. 60. Gg
05. 70. Fh
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Published: 01 December 2006
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