Role of Matter Interactions in Superradiant Phenomena
Abstract
The superradiant phenomenon, usually described by the Dicke model, is a hallmark of strong light-matter interaction. We explore how matter-matter interactions influence this phenomenon by performing ground-state simulations of Dicke-like models with both isotropic and anisotropic spin couplings. We find that Ising-type interactions produce two qualitatively distinct phase boundaries, one of which gives rise to an antiferromagnetic-normal phase connected to the superradiant regime via a first-order phase transition. Under anisotropic couplings, we uncover a strongly correlated phase where in-plane spin order coexists with superradiance, exhibiting sublinear scaling of the photon occupation per site and power-law decay of spin correlations. Furthermore, superradiance can be strengthened by tuning either isotropic or anisotropic interactions, highlighting the role of intrinsic many-body correlations in shaping light-matter quantum phases.
Keywords
Cite
@article{arxiv.2503.04961,
title = {Role of Matter Interactions in Superradiant Phenomena},
author = {João Pedro Mendonça and Krzysztof Jachymski and Yao Wang},
journal= {arXiv preprint arXiv:2503.04961},
year = {2025}
}