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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3619

Title: Crossover from ballistic to diffusive thermal transport in quantum Langevin dynamics study of a harmonic chain connected to self-consistent reservoirs
Authors: Roy, Dibyendu
Issue Date: Jun-2008
Publisher: American Physical Society
Citation: Physical Review E, 2008, Vol.77, 062102
Abstract: Through an exact analysis using quantum Langevin dynamics, we demonstrate the crossover from ballistic to diffusive thermal transport in a harmonic chain with each site connected to Ohmic heat reservoirs. The temperatures of the two heat baths at the boundaries are specified from the beginning, whereas the temperatures of the interior heat reservoirs are determined self-consistently by demanding that in the steady state, on average, there is no heat current between any such (self-consistent) reservoir and the harmonic chain. The essence of our study is that the effective mean free path separating the ballistic regime of transport from the diffusive one emerges naturally.
Description: Open Access
URI: http://hdl.handle.net/2289/3619
ISSN: E-ISSN: 1550-2376
P-ISSN: 1539-3755
Alternative Location: http://dx.doi.org/10.1103/PhysRevE.77.062102
http://arxiv.org/abs/0803.0278
Copyright: 2008 American Physical Society
Appears in Collections:Research Papers (TP)

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