216 citations · 1.4k across the 25 of their papers we have counts for
25 papers
Quantum Phase Transitions in Many-Dipole Light-Matter Systems
Daniele Lamberto, Omar Di Stefano, Stephen Hughes +2
A potential phase transition between a normal ground state and a photon-condensed ground state in many-dipole light-matter systems is a topic of considerable controversy, exasperat…
Photon condensation, Van Vleck paramagnetism, and chiral cavities
Alberto Mercurio, Gian Marcello Andolina, Francesco M. D. Pellegrino +6
We introduce a gauge-invariant model of planar, square molecules coupled to a quantized spatially-varying cavity electromagnetic vector potential A(r). Specifically, we choose a te…
Ultrastrong Magnon-Photon Coupling Achieved by Magnetic Films in Contact with Superconducting Resonators
Alberto Ghirri, Claudio Bonizzoni, Maksut Maksutoglu +4
Coherent coupling between spin wave excitations (magnons) and microwave photons in a cavity may disclose new paths to unconventional phenomena as well as for novel applications. He…
Pure Dephasing of Light-Matter Systems in the Ultrastrong and Deep-Strong Coupling Regimes
Alberto Mercurio, Shilan Abo, Fabio Mauceri +5
Pure dephasing originates from the non-dissipative information exchange between quantum systems and environments, and plays a key-role in both spectroscopy and quantum information…
Ultrastrong Coupling of a Qubit with a Nonlinear Optical Resonator
Fabio Mauceri, Alberto Mercurio, Salvatore Savasta +1
We study the interaction of a two-level atom with a single-mode nonlinear electromagnetic resonator, considering coupling strengths ranging from zero to the so-called deep strong c…
A non-perturbative no-go theorem for photon condensation in approximate models
G. M. Andolina, F. M. D. Pellegrino, A. Mercurio +3
Equilibrium phase transitions between a normal and a photon condensate state (also known as superradiant phase transitions) are a highly debated research topic, where proposals for…