Absence of entanglement growth in Dicke superradiance

N. S. B (2025)

Publication Type: Journal article

Publication year: 2025

Journal

Physical Review A American Physical Society

Book Volume: 112

Pages Range: 053713-1-053713-16

Journal Issue: 5

DOI: 10.1103/qxx1-xr44

Abstract

Dicke superradiance describes an ensemble of N permutationally invariant two-level systems collectively emitting radiation with a peak radiated intensity scaling as N2. Individual Dicke states are typically entangled. However, the density matrix during superradiant decay is a mixture of such states, raising the subtle question of whether the total state is entangled or separable. We resolve this by showing analytically that for any N, starting from the fully excited state, the collective decay preserves separability for all times. This answers a longstanding question on the role of entanglement in Dicke superradiance and underscores that, despite collective dissipation, separable states remain separable under these dynamics.

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

N. S., B. (2025). Absence of entanglement growth in Dicke superradiance. Physical Review A, 112(5), 053713-1-053713-16. https://doi.org/10.1103/qxx1-xr44

MLA:

N. S., Bassler. "Absence of entanglement growth in Dicke superradiance." Physical Review A 112.5 (2025): 053713-1-053713-16.

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