Superradiance and symmetry in resonant energy transfer

TL;DR

This paper explores how symmetry and spatial arrangement of quantum emitters influence superradiance and energy transfer rates, revealing conditions for enhanced or suppressed emission in complex configurations.

Contribution

It introduces exact expressions for superradiant fidelity in symmetric arrangements, extending understanding beyond closely-spaced emitters.

Findings

Symmetrical arrangements can achieve superradiance without close spacing.

Complete suppression of transfer rate in certain symmetric distributions.

Derived exact formulas for superradiant fidelity.

Abstract

Closely-spaced quantum emitters coherently sharing excitation can release their energy faster than suggested by a simple sum over their individual emission rates - a phenomenon known as superradiance. Here, we show that the assumption of closely-spaced emitters can be relaxed in the context of resonant energy transfer, instead finding that certain symmetrical arrangements of donors are just as effective. We derive exact expressions for the superradiant fidelity in such situations, finding some surprising results such as complete suppression of the rate for a single acceptor within a homogeneous spherically symmetric distribution of coherent donors.