Quantum phase transitions (QPTs) are usually associated with many-body systems in the
thermodynamic limit when their ground states show abrupt changes at zero temperature with …

Quadratic light-matter interactions are nonlinear couplings such that quantum emitters
interact with photonic or phononic modes exclusively via the exchange of excitation pairs …

We employ a polaron picture to investigate the properties of the two-photon quantum Rabi
model (QRM), which describes a two-level or spin-half system coupled with a single bosonic …

We demonstrate the existence of finite-component multicriticality in a qubit-boson model
where biased qubits collectively coupled to a single-mode bosonic field. The interplay …

We demonstrate the emergence of selective k-photon interactions in the strong and
ultrastrong coupling regimes of the quantum Rabi model with a Stark coupling term. In …

The light–matter interaction not only is ubiquitous in nature but also can be simulated in
various artificial systems. Besides the tunability of artificial quantum systems, the …

We study the semiclassical limit of the two-photon Dicke model with both cavity decay and
qubit dissipation, and extend a recent analysis of its stationary points [Garbe, Sci. Rep. 10 …

The Dicke model is a paradigmatic quantum-optical model describing the interaction of a
collection of two-level systems with a single bosonic mode. Effective implementations of this …

We study the semiclassical limit of the anisotropic two-photon Dicke model with a dissipative
bosonic field and describe its rich nonlinear dynamics. Besides normal and'superradiant' …

The Jaynes-Cummings quantum optics model allows us to understand the dialogue
between light and matter at its most fundamental level, which is crucial for advancements in …