Sep 10, 2019

Quantum Seminars: Non-perturbative Cavity QED

Date: September 10, 2019 | 11:00 am – 12:00 pm
Speaker: Peter Rabl, TU Vienna
Location: Heinzel Seminar Room / Office Bldg West (I21.EG.101)

In quantum optical systems the coupling between a single dipole and a single cavity mode is always much smaller than the absolute energy scales involved, which allows us to understand and model light-matter interactions in terms of well-defined atomic and photonic excitations. With recent advances in the field of circuit QED it is now possible to go beyond this well-established paradigm and enter a fully non-perturbative regime, where the coupling between a single artificial atom (e.g. a superconducting qubit) and a microwave photon exceeds the energy of the photon itself. Such conditions can be associated with an effective finestructure constant of order unity and in this talk I will give a brief introduction about the basics models and novel effects that govern the physics of light-matter interactions in this previously inaccessible regime.