Bonn 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 21: Poster – Atomic Systems in External Fields
A 21.2: Poster
Mittwoch, 12. März 2025, 17:00–19:00, Tent
Phase diagram and emergent phenomena in a nonequilibrium three-level Rydberg atom-cavity system — •Paul Haffner1, Igor Lesanovsky1,2, and Federico Carollo3 — 1Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany — 2School of Physics and Astronomy and Centre for the Mathematics and Theoretical Physics of Quantum Non-Equilibrium Systems, The University of Nottingham, Nottingham, NG7 2RD, United Kingdom — 3Centre for Fluid and Complex Systems, Coventry University, Coventry, CV1 2TT, United Kingdom
Atom-cavity systems are the focus of extensive research due to their rich nonequilibrium dynamics and potential applications in quantum technologies. Here, we investigate a nonequilibrium atom-cavity in which interacting Rydberg states are excited by a combination of the cavity-field and a laser. Using a mean-field approximation, we derive and analyze the nonlinear differential equations governing the system’s dynamics. The long-time steady state reveals three distinct phases—stationary states, dark states, and time crystals—with secondorder phase transitions separating them. A stability analysis confirms the robustness of these phases. Finally, we identify a specific fine-tuned condition under which electromagnetically induced transparency accompanied by a dark state emerges.
Keywords: Rydberg Atoms; Nonequilibrium dynamics; Electromagnetically induced transperency; Time crystals; Open quantum systems