Freiburg 2019 – wissenschaftliches Programm
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FM: Fall Meeting
FM 18: Quantum Networks: Interfaces & Hybrid Systems
FM 18.4: Talk
Montag, 23. September 2019, 17:30–17:45, 1015
grAl SQUID resonators for magnetomechanical coupling — •Christian Markus Florian Schneider1,2, Mathieu Juan2, David Zöpfl1,2, and Gerhard Kirchmair1,2 — 1Institut für Experimentalphysik, Universität Innsbruck, Innsbruck, Austria — 2Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Innsbruck, Austria
Granular Aluminum (grAl) has been proven to be an ideal material for magnetic coupling. The high critical field of this dirty superconductor allows operation in 100 - 500 mT magnetic fields. Recent experiments have further demonstrated high coherences of grAl resonators and qubits. We implement a superconducting quantum interference device (SQUID) made out of grAl constriction junctions to construct a flux sensitive grAl resonator. By placing a ferromagnetic cantilever on top of the SQUID loop, we achieve a strong magnetomechanical coupling. This approach could allow us to enter the strong single photon coupling regime between a macroscopic mechanical system and superconducting circuits - a milestone in the field of cavity optomechanics.