Quantum vs Classical Thermal Transport at Low Temperatures

• URL: http://arxiv.org/abs/2509.14027v1
• Date: Wed, 17 Sep 2025 14:29:49 GMT
• Title: Quantum vs Classical Thermal Transport at Low Temperatures
• Authors: Zhixing Zou, Jiangbin Gong, Jiao Wang, Giulio Casati, Giuliano Benenti,
• Abstract summary: This work aims to understand how quantum mechanics affects heat transport at low temperatures.<n>By considering a simple paradigmatic model, our simulations reveal the emergence of Negative Differential Thermal Resistance (NDTR)<n>In sharp contrast, the quantum version of the model, treated via a Lindblad master equation, exhibits no NDTR.
• Score: 10.247208534818538
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This work aims to understand how quantum mechanics affects heat transport at low temperatures. In the classical setting, by considering a simple paradigmatic model, our simulations reveal the emergence of Negative Differential Thermal Resistance (NDTR): paradoxically, increasing the temperature bias by lowering the cold bath temperature reduces the steady-state heat current. In sharp contrast, the quantum version of the model, treated via a Lindblad master equation, exhibits no NDTR: the heat current increases monotonically with thermal bias. This marked divergence highlights the fundamental role of quantum effects in low-temperature thermal transport and underscores the need to reconsider classical predictions when designing and optimizing nanoscale thermal devices.

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