Dr. Tobias Donner ETH Zürich Quantum Crystals of Matter and Light Donnerstag 18. April 2024, um 19:30 Uhr ETH Hauptgebäude Hörsaal HG G5, Rämistrasse 101 und Live Stream über Zoom (Link via e-Mail)

An artificial quantum world of atoms and light: Atoms (red) spontaneously arrange themselves in a checkerboard pattern as a result of the complex interplay between short-​ and long-​range interactions (ETH Zürich)

How such characteristics are related to the underlying microscopic processes is a central question for our understanding of materials. A versatile platform to address it are quantum gases coupled to the dynamic light field inside an optical resonator. This setting allows to create synthetic many-body systems with cavity-mediated long-range atom-atom interactions. If these are sufficiently strong, the system undergoes a structural phase transition to a supersolid crystal of matter and light, which we study in real time.

In a second set of experiments, we make use of the cavity-mediated interaction to induce the formation of pairs of correlated atoms. We demonstrate that this process is based on the amplification of vacuum fluctuations.

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