We investigate the heat flow transport properties of a parallel-coupled double quantum-dot system connected to two reservoirs with a temperature bias in the Coulomb blockade regime. We demonstrate that the effects of thermal rectification and negative differential thermal conductance (NDTC) exist in this system and analyze the influences of energy level difference and Coulomb interaction on the thermal rectification and NDTC. We find that this system can achieve a high thermal rectification ratio and NDTC when the asymmetry factor of the system is enhanced.

中文翻译：

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基于平行耦合双量子点的热整流和负微分热导

我们研究了平行耦合双量子点系统的热流传输特性，该系统连接到两个具有库仑封锁机制中的温度偏差的水库。我们证明了该系统中存在热整流和负微分热导 (NDTC) 的影响，并分析了能级差异和库仑相互作用对热整流和 NDTC 的影响。我们发现当系统的不对称因子增强时，该系统可以实现高的热整流比和 NDTC。