J. Leibig

Comment on “Role of matter interactions in superradiant phenomena”

Recently, Mendonça et al. [arXiv:2503.04961] investigated the Dicke-XXZ model and the Dicke-Ising model. For the latter model, their calculated quantum phase diagram contradicts claims about the existence of an intermediate phase with superradiant and antiferromagnetic order and...

Quantitative approach for the Dicke-Ising chain with an effective self-consistent matter Hamiltonian

In the thermodynamic limit, the Dicke-Ising chain is known to map exactly onto an effective self-consistent matter Hamiltonian with the photon field acting solely as a self-consistent effective field. As a consequence, no quantum correlations between photons and spins are needed...