Greenhorn Meeting 2026

Session

Rydberg excitations

5 Oct 2026, 12:15

Institute for Quantum Physics

11. Strong Light–Matter Coupling in a Rectangular Ring Cavity Integrated with a Rydberg-Atom Platform

Thomas Benedikt Beck (University Bonn)

05/10/2026, 12:15

Talk

Optical cavities are among the most powerful tools for enhancing atom–light coupling and constitute a key building block for future quantum technologies based on light–matter interfaces. Rydberg atoms, with their strong and tunable interactions, are a particularly attractive non-linear medium for such interfaces. We present the design and construction of a low-finesse, rectangular,...

19. Reducing decoherence in single-photon Rydberg excitation

Jule Brosig (Universität Tübingen)

05/10/2026, 13:45

Talk

Quantum simulation with single Rydberg atoms in an optical tweezer array is a powerful tool for investigating complex quantum systems. During the excitation of the atoms, however, technical and physical imperfections lead to decoherence in the system. In our case, a limiting technical imperfection is the phase noise of the laser used for the single-photon Rydberg excitation. A physical...

26. Effect of small interaction terms in a time-reversal protocol for a Rydberg quantum simulator

Varad Dhodapkar (Heidelberg University)

05/10/2026, 14:00

Talk

Our time-reversal protocol is implemented in a dipolar interacting, isolated many-body spin system represented by Rydberg states in an atomic gas. This protocol can be used in measurement of out-of-time-order correlators (OTOCs) since time reversal is essential for an OTOC which requires backward evolution of a system which can then be used to measure the extent of information scrambling in...

21. Dynamical Decoupling for Realising Time Reversal in Dipole–Dipole-Interacting Rydberg Systems

Moritz Linnebacher

05/10/2026, 14:15

Talk

Isolated, dipole–dipole-interacting Rydberg atoms realise effective pseudospin Hamiltonians dominated by exchange interactions. Reversing the sign of the exchange term enables time-reversal protocols and thus provides a route towards measuring out-of-time-order correlators (OTOCs). However, additional higher-order terms in the effective Hamiltonian, arising from couplings to off-resonant...