Reversal of Thermal Rectification in Quantum Systems

TL;DR

This paper investigates how thermal rectification in quantum spin chains can be reversed by external magnetic fields, temperature, anisotropy, and size, revealing controllable heat flow direction in quantum systems.

Contribution

It demonstrates the reversal of thermal rectification in quantum spin chains through external magnetic fields and other parameters, a novel control mechanism.

Findings

Rectification sign changes with magnetic field variation

Reversal also occurs with inhomogeneous magnetic fields

Reversal can be tuned by temperature, anisotropy, and chain size

Abstract

We study thermal transport in anisotropic Heisenberg spin chains using the quantum master equation. It is found that thermal rectification changes sign when the external homogeneous magnetic field is varied. This reversal also occurs when the magnetic field becomes inhomogeneous. Moreover, we can tune the reversal of rectification by temperatures of the heat baths, the anisotropy and size of the spin chains.