Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 17: Poster III
A 17.3: Poster
Tuesday, March 12, 2024, 17:00–19:00, Tent C
Enhancement of Zeptonewton Force Detection with a Single-Ion Nonlinear Oscillator — •Bo Deng1, Moritz Göb1, Benjamin A. Stickler2,3, Max Masuhr1,4, Daqing Wang1,4, and Kilian Singer1 — 1Institute of Physics, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany — 2Institute for Complex Quantum Systems, Ulm University, Albert-Einstein-Allee 11, 89069 Ulm, Germany — 3Faculty of Physics, University of Duisburg-Essen, Lotharstraße 1, 47057 Duisburg, Germany — 4Institute of Applied Physics, University of Bonn, Wegelerstraße 8, 53115 Bonn, Germany
Here we present an anharmonic oscillator implemented with a single atomic ion confined in a funnel-shaped potential [1]. The trapped particle experiences a coupling of radial and axial degrees of freedom that introduces nonlinearity to our system. The bifurcation and hysteresis of the resulting Duffing-type response are characterized. We further demonstrate an axial displacement force detection of ∼2.4 zN with a 20-fold enhancement using vibrational resonance effect [2]. The ability to conduct non-resonant low-frequency broadband sensing bears relevance for many fundamental physics studies.
[1] J. Roßnagel, S. T. Dawkins, K. N. Tolazzi, O. Abah, E. Lutz, F. Schmidt-Kaler, and K. Singer, A single-atom heat engine, Science 352, 325 (2016).
[2] B. Deng, M. Göb, B. A. Stickler, M. Masuhr, K. Singer, and D. Wang, Amplifying a zeptonewton force with a single-ion nonlinear oscillator, PRL 131, 153601 (2023).
Keywords: Trapped ions; Bifurcations; Optomechanics; Nonlinearity; Quantum thermodynamics