Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 4: Hybrid Quantum Systems

Q 4.3: Talk

Monday, March 11, 2024, 11:30–11:45, HS 1199

Interfacing Rydberg atoms with an electromechanical oscillator at 4K — •Cedric Wind, Johanna Popp, Leon Sadowski, Julia Gamper, Valerie Mauth, Wolfgang Alt, Hannes Busche, and Sebastian Hofferberth — Institute of Applied Physics, University of Bonn, Germany

We currently construct a novel setup to interface optically controlled Rydberg atoms with an on-chip electromechanical oscillator at 4K. This talk discusses the prospects of implementing this hybrid quantum system and presents our progress on the construction of the cryogenic setup. As a first experiment, we will explore the cooling of a GHz mechanical mode to its quantum mechanical ground state by extracting phonons via a dissipative extraction of microwave photons via Rydberg atoms.

Our system combines a closed-cycle cryostat with vibration isolation with a classical room-temperature setup from which ultra-cold atoms are magnetically transported into the cryo-region. Besides providing the suppression of thermal noise required to study electromechanical oscillators near their ground state, the enhanced vacuum condition due to cryo-pumping eliminates the need to bake the vacuum system and enables fast exchange and cooling of samples in the experiment region. We will discuss how the setup, the on-chip superconducting magnetic trap and the electromechanical oscillator design have been optimized for the planned experiment.