Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 63: Strong Light-Matter Interaction
Q 63.6: Vortrag
Freitag, 15. März 2024, 12:15–12:30, HS 3118
Optomechanical subradiant states in a many-body cavity QED system — Alexander Baumgärtner1, •Simon Hertlein1, Tom Schmit2, Davide Dreon1, Carlos Maximo1, and Giovanna Morigi2 — 1Institute for Quantum Electronics, Eidgenössische Technische Hochschule Zürich, 8093 Zurich, Switzerland — 2Theoretische Physik, Universität des Saarlandes, 66123 Saarbrücken, Germany
The essence of subradiance lies in its counterintuitive suppression of spontaneous emission, challenging conventional expectations of the collective behavior of scatterers. In the experimental setting of a Bose-Einstein condensate (BEC) system positioned at the mode crossing of two optical cavities, the onset of superradiance in one cavity causes the emergence of a subradiant state in the adjacent cavity. The identification of this subradiant state is facilitated by the revelation of hysteretic behavior during transitions between the superradiant states of the cavities. We investigate experimentally and theoretically the extents of this effect and measure its limitations. This phenomenon, governed by an interplay of constructive and destructive interference, showcases the potential of subradiance as a controllable and exploitable quantum phenomenon in many-body systems interacting with multi-mode cavities.
Keywords: Subradiance; Optomechanics; Many-body; cavity QED; Bose-Einstein Condensate