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TT: Fachverband Tiefe Temperaturen
TT 15: Nano- and Optomechanics
TT 15.1: Talk
Tuesday, September 6, 2022, 11:15–11:30, H23
Mechanical frequency control in inductively coupled electromechanical systems — •Thomas Luschmann1,2,3, Philip Schmidt1,2, Frank Deppe1,2,3, Achim Marx1, Alvaro Sanchez4, Rudolf Gross1,2,3, and Hans Huebl1,2,3 — 1Walther-Meißner- Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2Physik-Department, Technische Universität München, Garching, Germany — 3Munich Center for Quantum Science and Technology, Munich, Germany — 4Department of Physics, Universitat Autonoma de Barcelona, Bellaterra, Spain
Nano-electromechanical systems couple mechanical motion to superconducting quantum circuits at microwave frequencies. While traditional, capacitive coupling strategies operate in the weak coupling regime, inductive coupling schemes based on partially suspended superconducting interference devices (SQUID) have demonstrated significantly improved coupling rates. Such systems are expected to allow for the exploration of phenomena beyond the linearized opto-mechanical interaction. Here, we present an investigation into the tuning of the mechanical resonance frequency in an inductively coupled system. The experimental data quantitatively corroborates theoretical predictions for SQUID-based electromechanical systems. In addition, we observe a magnetic field dependent tuning of the mechanical resonance frequency, which we attribute to an effective interaction of the atomic lattice and the superconducting vortex lattice.