Recently, a superradiant phase transition first predicted theoretically in the quantum Rabi
model (QRM) has been verified experimentally. This further stimulates the interest in the …

Light‐matter interactions provide an ideal testground for interplay of critical phenomena,
topological transitions, quantum metrology, and non‐Hermitian physics with high …

We investigate a generalized Dicke model by introducing two interacting spin ensembles
coupled with a single-mode bosonic field. Apart from the normal to superradiant phase …

The phase transition is both thermodynamically and quantum-mechanically ubiquitous in
nature or laboratory and its understanding is still one of most active issues in modern …

The quantum to classical transition (QCT) is one of the central mysteries in quantum physics.
This process is generally interpreted as state collapse from measurement or decoherence …

Phase transitions are both thermodynamically and quantum-mechanically ubiquitous in
nature and laboratories, and their understanding remains one of the most active issues in …

It is shown that the phenomenon of Dicke superradiance essentially occurs due to
spontaneous symmetry breaking. Two generalised versions of the Dicke model are studied …