SAMOP 2023 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 4: Quantum Effects (QED) (joint session Q/A)
A 4.5: Vortrag
Montag, 6. März 2023, 12:00–12:15, F442
The Casimir-Polder force near an elliptical nanowire — •Bettina Beverungen1, Kurt Busch1,2, and Francesco Intravaia1 — 1Humboldt-Universität zu Berlin, Institut für Physik, AG Theoretische Optik & Photonik, Newtonstr. 15, 12489 Berlin, Germany — 2Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Str. 2 A, 12489 Berlin, Germany
Quantum and thermal fluctations of the electromagnetic field lead to many highly interesting and nontrivial effects such as the emergence of forces between neutral objects. These persist even in the limit of zero temperature due to the irreducible nature of the quantum fluctuations. While these interactions typically fall off rapidly with distance, they play a significant role at short separations relevant for modern nanotechnological applications. It is therefore important to understand how they depend on the geometry and material properties of the objects involved.
A prominent example is the Casimir-Polder force, which describes the interaction between a neutral atom or nanoparticle and a macroscopic object. Here, we investigate this interaction for an atom near a metallic nanowire of elliptical cross section. To verify the validity of our results, we show that they reduce to the case of a circular nanowire for low ellipticities. As a way to gain additional insight into the problem, we analyze the asymptotic behavior of the interaction energy with a particular focus on the distance regime where the effect of curvature is most pronounced.