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FM: Fall Meeting

FM 41: Poster: Quantum Sensing

FM 41.2: Poster

Dienstag, 24. September 2019, 16:30–18:30, Tents

Detecting the motion of mechanical oscillators with superconducting quantum interference devices — •K. Uhl¹, J. Hofer², J. Slater², C. Schneider³, G. Kirchmair³, O. F. Kieler⁴, T. Weimann⁴, M. Aspelmeyer², D. Koelle¹, and R. Kleiner¹ — ¹Physikalisches Institut and Center for QuantumScience (CQ) in Lisa+, Universität Tübingen, Germany — ²Vienna Center for Quantum Science and Technology, University of Vienna, Austria — ³Institute for Experimental Physics, University of Innsbruck, Austria — ⁴Fachbereich Quantenelektronik, Physikalisch- Technische Bundesanstalt (PTB) Braunschweig, Germany

Levitating solid-state objects, like a superconducting particle in a magnetic trap or a cantilever with a superconducting strip, offer a unique approach to the realization of nano- or even micro-sized quantum systems with potentially minimal decoherence. In combination with cryogenic temperatures, the coherence times in the quantum mechanical ground state can be increased significantly. Our goal is to employ a superconducting quantum interferometer to gain information on position and oscillatory behavior of the levitated objects. To optimize magnetic coupling between oscillator and SQUID, we performed numerical simulations based on London equations and evaluated various SQUID designs. The results of the numerical simulations and experimentally determined SQUID performance will be presented.