Spontaneous scattering of Raman photons from cavity-QED systems in the ultrastrong coupling regime

V Macrì, A Mercurio, F Nori, S Savasta… - Physical Review Letters, 2022 - APS
We show that spontaneous Raman scattering of incident radiation can be observed in cavity-
QED systems without external enhancement or coupling to any vibrational degree of …

Phase transitions, collective emotions and decision-making problem in heterogeneous social systems

D Tsarev, A Trofimova, A Alodjants, A Khrennikov - Scientific reports, 2019 - nature.com
The paper considers the problem of collective decision-making as a second order phase-
transition, which occurs in heterogeneous information-oriented communities possessing …

Single-photon source over the terahertz regime

C Groiseau, AI Fernández-Domínguez, D Martín-Cano… - PRX Quantum, 2024 - APS
We present a proposal for a tunable source of single photons operating in the terahertz
(THz) regime. This scheme transforms incident visible photons into quantum THz radiation …

Beyond the Rabi model: Light interactions with polar atomic systems in a cavity

G Scala, K Słowik, P Facchi, S Pascazio, FV Pepe - Physical Review A, 2021 - APS
The Rabi Hamiltonian, describing the interaction between a two-level atomic system and a
single-cavity mode of the electromagnetic field, is one of the fundamental models in …

Terahertz spectroscopy of semiconductor microcavity lasers: Photon lasers

M Spotnitz, NH Kwong, R Binder - Physical Review B, 2021 - APS
Semiconductor microcavities can exhibit various macroscopic quantum phenomena,
including Bose-Einstein condensation of polaritons, Bardeen-Cooper-Schrieffer (BCS) …

Hybrid graphene-silver nanoantenna to control THz emission from polar quantum systems

S Izadshenas, P Gładysz, K Słowik - Optics Express, 2023 - opg.optica.org
Fluorescent light emission from atomic quantum systems routinely occurs at the illumination
frequency. If the system is polar, an additional fluorescence peak appears at a much lower …

High temperature superradiant phase transition in quantum structures with a complex network interface

AY Bazhenov, M Nikitina, AP Alodjants - Optics Letters, 2022 - opg.optica.org
In the present work we propose a novel, to the best of our knowledge, quantum material
concept, which enables superstrong and/or ultrastrong interaction of two-level systems with …

Dressed Atom Revisited: Hamiltonian-Independent Treatment of the Radiative Cascade

FV Pepe, K Słowik - Physical Review Letters, 2024 - APS
The dressed atom approach provides a tool to investigate the dynamics of an atom-laser
system by fully retaining the quantum nature of the coherent mode. In its standard derivation …

Transition from inhomogeneous to homogeneous broadening at a lasing prethreshold

IS Pashkevich, IV Doronin, ES Andrianov… - Physical Review A, 2024 - APS
The emission linewidth in active medium emerges due to homogeneous and
inhomogeneous broadening. We demonstrate that in lasers with inhomogeneous …

Theoretical proposals to measure resonator-induced modifications of the electronic ground state in doped quantum wells

Y Wang, S De Liberato - Physical Review A, 2021 - APS
Recent interest in the physics of nonperturbative light-matter coupling led to the
development of solid-state cavity quantum electrodynamics setups in which the interaction …