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Q: Fachverband Quantenoptik und Photonik
Q 29: Optomechanics I
Q 29.2: Talk
Wednesday, March 16, 2022, 11:00–11:15, Q-H13
Ultrastrong Coupling in an Optomechanical System — •Kahan Dare1,2, Jannek Hansen1,2, Aisling Johnson1,2, Uros Delic1,2, and Markus Aspelmeyer1,2 — 1Vienna Center for Quantum Science and Technology,Faculty of Physics, University of Vienna, Vienna, Austria — 2Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, Vienna, Austria
The ultrastrong coupling regime, where the coherent coupling rate approaches the transition energy of the system, is a rarely studied area of physics despite its vast array of novel physics such as two-mode squeezing, the dynamical Casimir effect and non-gaussian ground states. Only a handful of experiments have been recently developed to probe this regime due to the large technologically challenges associated with engineering such a system.
Here, we implement a simple scheme for reaching the ultrastrong coupling regime in an optomechanical system which can be dynamically tuned to implement a wide range of quantum control protocols. We achieve this by coupling a levitated nanoparticle to an optical cavity through coherent scattering. Together with the ability to cool the system to its motional ground state, this result opens up quantum experiments in the USC regime to simple table-top systems. Lastly, we outline how to extend this to the deep strong coupling regime and its potential for future applications.