Heat transport via a local two-state system near thermal equilibrium

Tsuyoshi Yamamoto, Masanari Kato, Takeo Kato, Keiji Saito

研究成果: Article査読

19 被引用数 (Scopus)

抄録

Heat transport in spin-boson systems near the thermal equilibrium is systematically investigated. An asymptotically exact expression for the thermal conductance in a low-temperature regime wherein transport is described via a co-tunneling mechanism is derived. This formula predicts the power-law temperature dependence of thermal conductance ∝T2s+1 for a thermal environment of spectral density with the exponent s. An accurate numerical simulation is performed using the quantum Monte Carlo method, and these predictions are confirmed for arbitrary thermal baths. Our numerical calculation classifies the transport mechanism, and shows that the non-interacting-blip approximation quantitatively describes thermal conductance in the incoherent transport regime.

本文言語English
論文番号093014
ジャーナルNew Journal of Physics
20
9
DOI
出版ステータスPublished - 2018 9月

ASJC Scopus subject areas

  • 物理学および天文学一般

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