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QI: Fachverband Quanteninformation
QI 14: Focus Session: Nanomechanical Systems for Classical and Quantum Sensing I (joint session TT/DY/HL/QI)
QI 14.5: Vortrag
Dienstag, 19. März 2024, 12:45–13:00, H 3007
Optimization of Flux-Tunable Microwave Resonators for Strong Single-Photon Optomechanics in Nano-Electromechanical Systems — •Korbinian Rubenbauer1,2, Thomas Luschmann1,2, Kedar Honasoge1,2, Achim Marx1,2, Kirill G. Fedorov1,2,3, Rudolf Gross1,2,3, and Hans Huebl1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2School of Natural Sciences, Technical University of Munich, Garching, Germany — 3Munich Center for Quantum Science and Technologies, Munich, Germany
Quantum sensing leverages quantum properties to enhance the precision of sensing applications. One promising implementation for the detection of forces or accelerations are optomechanical systems which encode the displacement of a low-frequency mechanical element onto the properties of a high-frequency optical or electromagnetic resonator. We present a flux-tunable superconducting quantum circuit with an integrated superconducting quantum interference device (SQUID), where the mechanical element is embedded in the SQUID structure. This implements a magnetic field and flux tunable optomechanical interaction with the prospect of reaching the strong single-photon coupling regime. We discuss the design concept of the device and detail its optimization. We corroborate the conceptual improvements with experimental data demonstrating the performance improvements of the microwave resonator, the optomechanical coupling and the mechanical element.
Keywords: Optomechanics; Nanoelectromechanics; Nano-Electromechanics; Flux-tunable resonators; Fabrication