Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 39: Posters: Quantum Optics and Photonics III
Q 39.57: Poster
Wednesday, March 11, 2020, 16:30–18:30, Empore Lichthof
Magnetic interactions in nonequilibrium atom-surface dispersion forces — •Simon Hermann1, Kurt Busch1,2, and Francesco Intravaia1 — 1Humboldt- Universität zu Berlin, Institut für Physik, AG Theoretische Optik & Photonik, Newtonstr. 15, 12489 Berlin, Germany — 2Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2A, 12489 Berlin, Germany
Driving a microscopic object above a planar medium induces a force opposing the direction of motion even if both the object and the material are non-magnetic and electrically neutral. The interaction stems from the fluctuations within the microscopic object and the medium and occurs even if the temperature goes to zero, rendering the effect a purely quantum phenomenon.
This fluctuation-induced interaction heavily relies on long-time correlations making it an excellent example of a non-Markovian nonequilibrium phenomenon [1]. Due to the mathematical complexity of the problem, most of the earlier descriptions focused on the electric contribution to the interaction. Here, we present a more complete treatment that also takes into account the contribution arising from the nonequilibrium magnetic fluctuations of the system.
[1] F. Intravaia, R. O. Behunin, C. Henkel, K. Busch and D.A.R. Dalvit
Non-Markovianity in atom-surface dispersion forces Phys. Rev. A 94 042114 (2016).