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This research proposes stabilizing low-threshold superradiant phases in cavity QED by leveraging photonic Kerr nonlinearity and dissipation, effectively bypassing experimental limitations of the standard Dicke model. The study demonstrates how engineered light-matter interactions can enable new lasing regimes and bath-engineered quantum states without relying on external magnetic fields to suppress diamagnetic terms.
Dissipation-induced superradiance in matter coupled to a self-interacting cavity
arXiv:2606.14526v1 Announce Type: new Abstract: Light-matter interactions are often modeled via the Dicke model, namely, by two-level systems coupled to a cavity mode. Alas, the threshold for superradiance is often experimentally inaccessible or hindered by light's diamagnetic term. Here, within the Dicke setting, we consider self-interacting light in a cavity, modeled by a photonic Kerr nonlinearity. We show that negative Kerr nonlinearity gives rise to a low-threshold superradiant phase with spin inversion. While unstable in a closed system, cavity dissipation stabilizes this lit phase, opening avenues for lasing and bath-engineered phases.
Abstract:Light-matter interactions are often modeled via the Dicke model, namely, by two-level systems coupled to a cavity mode. Alas, the threshold for superradiance is often experimentally inaccessible or hindered by light's diamagnetic term. Here, within the Dicke setting, we consider self-interacting light in a cavity, modeled by a photonic Kerr nonlinearity. We show that negative Kerr nonlinearity gives rise to a low-threshold superradiant phase with spin inversion. While unstable in a closed system, cavity dissipation stabilizes this lit phase, opening avenues for lasing and bath-engineered phases.
Quantum Physics (quant-ph); Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
arXiv:2606.14526 [quant-ph]
(or arXiv:2606.14526v1 [quant-ph] for this version)
https://doi.org/10.48550/arXiv.2606.14526 Focus to learn more arXiv-issued DOI via DataCite (pending registration)
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Full text under the publisher's open licence · 185 words