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arXiv · 1407.7197

Energy spread and current-current correlation in quantum systems

Yonghong Yan·Feng Jiang·Hui Zhao
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Abstract

We consider energy (heat) transport in quantum systems, and establish a relationship between energy spread and energy current-current correlation function. The energy current-current correlation is related to thermal conductivity by the Green-Kubo formula, and thus this relationship allows us to study conductivity directly from the energy spread process. As an example, we investigate a spinless fermion model; the numerical results confirm the relationship.

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Yonghong Yan, Feng Jiang, Hui Zhao. 2014-07-27. Energy spread and current-current correlation in quantum systems. https://doi.org/10.1140/epjb/e2014-50797-4

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