Unraveling Dicke Superradiant Decay with Separable Coherent Spin States
Quantum Physics
2025-10-02 v2
Abstract
We show that idealized Dicke superradiant decay from a fully inverted state can at all times be described by a positive statistical mixture of coherent spin states (CSS). Since CSS are separable, this implies that no entanglement is involved in Dicke decay. Based on this result, we introduce a new numerical quantum trajectory approach leading to low-entanglement unravelings. This opens up new possibilities for employing matrix product state (MPS) techniques for large-scale numerical simulations with collective decay processes.
Keywords
Cite
@article{arxiv.2504.13418,
title = {Unraveling Dicke Superradiant Decay with Separable Coherent Spin States},
author = {Pedro Rosario and Luiz O. R. Solak and A. Cidrim and R. Bachelard and Johannes Schachenmayer},
journal= {arXiv preprint arXiv:2504.13418},
year = {2025}
}