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Open Quantum Systems Decoherence

Superradiance and subradiance in extended media

arXiv

Authors: Jonathan F. Schonfeld

Year

2017

Paper ID

45097

Status

Preprint

Abstract Read

~2 min

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Abstract

In super- or subradiance, a quantum superposition of excited atoms collectively emits a photon much more or much less rapidly than an isolated atom. Superradiant and subradiant lifetimes have been derived for finite spheres of uniform media, either by simulating random samples or by expanding in spherical harmonics and analyzing Bessel functions. We introduce a simple regulator that applies to unbounded media, enabling trivial derivation and analysis of lifetimes via elementary Fourier techniques. The regulator can be interpreted as a correlation length for atomic positions; the regularized system describes localized regions of enhanced radiative activity in otherwise quiescent surroundings.

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In super- or subradiance, a quantum superposition of excited atoms collectively emits a photon much more or much less rapidly than an isolated atom.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1707.05237 [2] arXiv https://arxiv.org/abs/1707.05237 [3] Publisher https://arxiv.org/abs/1707.05237

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