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arXiv · 2607.28034

Scaling theory of decoherence in Dicke superradiance

Nico S. Bassler·Julian Lyne·Javier Cuerda
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Abstract

The survival of many-body coherence depends on the competition between correlation buildup and decoherence. In Dicke superradiance, collective emission builds up correlations, producing a peak intensity scaling as $N^2$ for $N$ emitters. We develop a scaling theory including local dephasing and spontaneous emission and obtain fully collective, partially collective, and independent-emitter scaling regimes. The boundary of the fully collective regime defines a continuous phase transition in a transient observable. Local decoherence can prevent $N^2$ scaling despite increasing $N$.

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Nico S. Bassler, Julian Lyne, Javier Cuerda. 2026-07-30. Scaling theory of decoherence in Dicke superradiance. https://arxiv.org/abs/2607.28034

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