Possibility of superradiance by magnetic nanoclusters

TL;DR

This paper investigates the potential for magnetic nanoclusters to produce superradiant emission, overcoming known obstacles through a detailed microscopic theory of their spin dynamics.

Contribution

It develops a microscopic theory demonstrating the feasibility of achieving superradiance with magnetic nanoclusters despite challenges.

Findings

Superradiance is theoretically possible with magnetic nanoclusters.

A microscopic model accurately describes nanocluster spin dynamics.

Strong superradiant emission can be achieved despite anisotropy and size nonuniformity.

Abstract

The possibility of realizing spin superradiance by an assembly of magnetic nanoclusters is analyzed. The known obstacles for realizing such a coherent radiation by magnetic nanoclusters are their large magnetic anisotropy, strong dephasing dipole interactions, and an essential nonuniformity of their sizes. In order to give a persuasive conclusion, a microscopic theory is developed, providing an accurate description of nanocluster spin dynamics. It is shown that, despite the obstacles, it is feasible to organize such a setup that magnetic nanoclusters would produce strong superradiant emission.