Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 26: Poster – Precision Measurement, Metrology, and Quantum Effects

Q 26.22: Poster

Dienstag, 11. März 2025, 14:00–16:00, Tent

A single-atom array strongly coupled to an optical cavity for quantum simulation — •Marcel Kern, Thomas Picot, Clément Raphin, Jakob Reichel, and Romain Long — Laboratoire Kastler-Brossel, Paris, France

Coupling certain materials to an optical cavity in the strong coupling regime can drastically change their chemical properties - a field of research known as polaritonic chemistry [1]. The underlying microscopic mechanisms are subject to intense research, where disorder and infinite long-range interactions are key in proposed theoretical models. One potential experimental implementation involves individually controllable, single, neutral atoms strongly coupled to an optical cavity, enabling an infinite and tunable interaction range, as well as frequency disorder via local light shifts.

In our group, high-finesse Fiber Fabry-Perot Cavities allow the operation in the strong coupling regime for a single emitter (Cooperativity ∼ 100). Single ⁸⁷Rb atoms are trapped in an array of optical tweezers, providing individual detectability and control over their coupling parameters. The states of the atoms can be either detected one by one via cavity transmission or at once via background-free fluorescence spectroscopy. With this platform, the transport properties in long-range interacting spin chains can be explored, relevant for polaritonic chemistry, and generally for studying quantum entanglement propagation.

[1] T. W. Ebbesen, et al. - Chemical Reviews 2023 123(21)

Keywords: Strong light-matter interactions; Single-atom array; Tweezers in Cavity; Quantum simulation