Far-field heat and angular momentum radiation of the Haldane model

TL;DR

This paper develops a theory for far-field heat and angular momentum radiation from 2D topological systems, specifically applying it to the Haldane model, revealing temperature-dependent behaviors and potential for quantum information transfer.

Contribution

It introduces a general theoretical framework for radiation from 2D topological materials and applies it to the Haldane model, highlighting new radiation phenomena and optimization strategies.

Findings

Heat radiation follows Planck's law at low temperatures

Angular momentum radiation saturates at high temperatures

Parameters affecting radiation are identified and optimized

Abstract

We investigate the radiation of energy and angular momentum from 2D topological systems with broken inversion symmetry and time reversal symmetry. A general theory of far-field radiation is developed using the linear response of 2D materials to the fluctuational electromagnetic field. Applying the theory to the Haldane model, we verify that the heat radiation complies with Planck's law only at low temperature and deviates from it as temperature becomes high. Angular momentum radiation is possible for this system and exhibits saturation as temperature increases. Parameters crucial to the radiation are investigated and optimized. This research enlightens the possibility of transposing the quantum information to the angular momentum degree of freedom.