Semesterübersicht Sommersemester 2025
Wintersemester 2024/2025 - Sommersemester 2025 - Wintersemester 2025/2026
keine vergangenen Seminare
Seminar über die Physik der kondensierten Materie (SFB/TRR173 Spin+X und SFB/TR288 Kolloquium, TopDyn-Seminar)
JGU 14:00 Uhr s.t., 05-427 Sozialraum der Thep |
| Prof. Junichiro Kono, Rice University Houston United States | |
Recent advances in optical studies of condensed matter have led to the emergence of a variety of phenomena that have conventionally been studied in quantum optics. These studies have not only deepened our understanding of light-matter interactions but also introduced aspects of many-body effects inherent in condensed matter. This talk will describe our recent studies of Dicke cooperativity, i.e., many-body enhancement of light-matter interaction, a concept in quantum optics, in condensed matter. This enhancement has led to the realization of the ultrastrong coupling (USC) regime, where new phenomena emerge through the breakdown of the rotating wave approximation (RWA). We will first describe our observation of USC in a 2D electron gas in a high-Q terahertz cavity in a magnetic field, and definitive evidence for the vacuum Bloch-Siegert shift, a signature of the breakdown of the RWA. Further, we have shown that cooperative USC also occurs in magnetic solids in the form of matter-matter interaction, i.e., spin-magnon and magnon-magnon interactions in rare earth orthoferrites. Particularly, the exchange interaction of N paramagnetic Er3+ spins with an Fe3+ magnon field in ErFeO3 has exhibited a vacuum Rabi splitting whose magnitude is proportional to N1/2 [6]. In the lowest temperature range, these cooperative interactions lead to a magnonic superradiant phase transition. These results provide a route for understanding, controlling, and predict novel phases of condensed matter. | |
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Seminar über die Physik der kondensierten Materie (SFB/TRR173 Spin+X und SFB/TR288 Kolloquium, TopDyn-Seminar)
JGU Sonderseminar: 14:00 Uhr s.t., 05-427 Sozialraum der Thep |
| Prof. Junichiro Kono, Rice University Houston United States | |
Recent advances in optical studies of condensed matter have led to the emergence of a variety of phenomena that have conventionally been studied in quantum optics. These studies have not only deepened our understanding of light-matter interactions but also introduced aspects of many-body effects inherent in condensed matter. This talk will describe our recent studies of Dicke cooperativity, i.e., many-body enhancement of light-matter interaction, a concept in quantum optics, in condensed matter. This enhancement has led to the realization of the ultrastrong coupling (USC) regime, where new phenomena emerge through the breakdown of the rotating wave approximation (RWA). We will first describe our observation of USC in a 2D electron gas in a high-Q terahertz cavity in a magnetic field, and definitive evidence for the vacuum Bloch-Siegert shift, a signature of the breakdown of the RWA. Further, we have shown that cooperative USC also occurs in magnetic solids in the form of matter-matter interaction, i.e., spin-magnon and magnon-magnon interactions in rare earth orthoferrites. Particularly, the exchange interaction of N paramagnetic Er3+ spins with an Fe3+ magnon field in ErFeO3 has exhibited a vacuum Rabi splitting whose magnitude is proportional to N1/2 [6]. In the lowest temperature range, these cooperative interactions lead to a magnonic superradiant phase transition. These results provide a route for understanding, controlling, and predict novel phases of condensed matter. | |
Sonderseminar | |
Special Event |
PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Antoine Kouchner, APC, France | |
Neutrino News from the Deep-Mediterranean Sea (KM3NeT) | |
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Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)
Institut für Physik 14:15 Uhr s.t., IPH Lorentzraum 05-127 |
| Dr. Hendrik Bekker, Helmholtz Institut Mainz | |
TBA | |
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Theorie-Palaver
Institut für Physik 14:00 Uhr s.t., Lorentz room (Staudingerweg 7, 5th floor) |
| Duarte Fontes, KIT | |
TBA | |
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PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Xanguo Lu, University of Warwick, England, UK | |
Neutrino Interactions and Future Experiments | |
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Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)
Institut für Physik 14:15 Uhr s.t., IPH Lorentzraum 05-127 |
| Prof. Dr. Piet O. Schmidt, PTB (Leibniz Universität Hannover) | |
TBA | |
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PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Daniel Stolarski, Carleton University, Ottawa, Canada | |
New Results for Non-perturbative Quantum Field Theory | |
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PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Florian Bernlochner, University Bonn | |
Status and Outlook of the Belle II Experiment | |
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Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)
Institut für Physik 14:15 Uhr s.t., IPH Lorentzraum 05-127 |
| Dr. Denis Kopylov, Universität Paderborn Comp. Optoelectronics and Photonics | |
TBA | |
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PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Garrett King, Los Alamos, USA | |
Study of Nuclear Physics for New Physics with Quantum Monte Carlo | |
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PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Andreas Jüttner, CERN, Geneva, Switzerland | |
Flavour Physics on the Lattice | |
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PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Jacqueline Keintzel, CERN, Geneva, Switzerland | |
Future colliders: possibilities and challenges | |
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PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Livia Ludhova, FZ Jülich & JGU Mainz | |
Present Status of JUNO | |
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Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)
Institut für Physik 14:15 Uhr s.t., IPH Lorentzraum 05-127 |
| Prof. Dr. Christine Silberhorn, Universität Paderborn (Integrierte Quantenoptik) | |
TBA | |
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PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Frank Ohme, MPI for Gravitational Physics, Hannover | |
Gravitational Waves with LIGO & Precision Tests of the Gravitational Law | |
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Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)
Institut für Physik 14:15 Uhr s.t., IPH Lorentzraum 05-127 |
| Prof. Dr. Sven Höfling, Julius-Maximilians-Universität Würzburg | |
TBA | |
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PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Thomas Siegert, University Würzburg | |
MeV Astrophysics - INTEGRAL’s Heritage and COSI’s Future | |
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PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Ruth Pottgen, Lund University, Sweden | |
The LDMX Experiment | |
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PRISMA+ Colloquium
Institut für Physik 13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7 |
| Prof. Dr. Chen Ji, Wuhan University, China | |
Effective field theory for Nuclear Halo and Clustering | |
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