Mainz 2026 – scientific programme

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A: Fachverband Atomphysik

A 36: Poster – Ultra-cold Atoms, Ions and BEC (joint session A/Q)

A 36.21: Poster

Thursday, March 5, 2026, 17:00–19:00, Philo 1. OG

Microwave-Optical Multiphoton Lattice for an Ultracold Atomic Rubidium Quantum Gas — •Patrick Haas, Stefanie Moll, and Martin Weitz — Institut für Angewandte Physik, Bonn, Germany

Quantum simulations of solid state physics theory effects, as well as many applications in quantum information, strongly benefit from recent advances obtained with cold atoms in optical lattices. Here we report on progress in the development of a state-selective optical lattice for alkali atoms despite the usage of extremely far detuned trapping light fields. For this, we employ a doubly resonant lattice scheme that combines optical and microwave transitions. We present both the basic working scheme as well as results of a proof-of-principle experiment demonstrating the resulting spatially varying trapping potential for cold rubidium atoms. Prospects of this work include fault-tolerant quantum computation as well as measurement-based quantum information processing.

Keywords: Optical Lattice; Rubidium; Cluster States; Quantum Simulation