Local thermal probe in a one-dimensional chain: An efficient dissipaton-based approach
Fuente:
arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866908924757671936 |
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| author | Qi, Hao-Yang Zhu, Zi-Fan Wang, Yao Xu, Rui-Xue Yan, YiJing |
| author_facet | Qi, Hao-Yang Zhu, Zi-Fan Wang, Yao Xu, Rui-Xue Yan, YiJing |
| contents | We study a system consisting of an infinite one-dimensional molecular chain and a locally coupled probe. Starting from the Hamiltonian of the chain-probe composite and the corresponding spectral densities, we evaluate the heat current between the probe and the chain. For this purpose, we develop a dissipaton-based quantum approach that is fully nonperturbative and non-Markovian. The dissipaton algebra yields a set of hierarchically coupled equations of motion for the dissipaton moments, with cross-tier connections in an iterative manner if higher-order chain-probe interactions are included. Numerical results demonstrate the effects of temperature, frequency, onsite energy modification and higher-order couplings on heat transport. This work provides a general framework for thermal transport and other properties in locally probed systems and can be straightforwardly extended to higher-dimensional materials and electronic transport problems with strong many-body effects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_29458 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Local thermal probe in a one-dimensional chain: An efficient dissipaton-based approach Qi, Hao-Yang Zhu, Zi-Fan Wang, Yao Xu, Rui-Xue Yan, YiJing Chemical Physics We study a system consisting of an infinite one-dimensional molecular chain and a locally coupled probe. Starting from the Hamiltonian of the chain-probe composite and the corresponding spectral densities, we evaluate the heat current between the probe and the chain. For this purpose, we develop a dissipaton-based quantum approach that is fully nonperturbative and non-Markovian. The dissipaton algebra yields a set of hierarchically coupled equations of motion for the dissipaton moments, with cross-tier connections in an iterative manner if higher-order chain-probe interactions are included. Numerical results demonstrate the effects of temperature, frequency, onsite energy modification and higher-order couplings on heat transport. This work provides a general framework for thermal transport and other properties in locally probed systems and can be straightforwardly extended to higher-dimensional materials and electronic transport problems with strong many-body effects. |
| title | Local thermal probe in a one-dimensional chain: An efficient dissipaton-based approach |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2603.29458 |