Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.56: Poster
Thursday, March 8, 2018, 16:15–18:15, Redoutensaal
Proximity force approximation and specular reflection: application of WKB Mie scattering to the Casimir effect — •Benjamin Spreng1, Michael Hartmann1, Vinicius Henning2, Paulo A. Maia Neto2, and Gert-Ludwig Ingold1 — 1Universität Augsburg, Institut für Physik, 86135 Augsburg, Germany — 2Instituto de Física, UFRJ, Rio de Janeiro, Brazil
The electromagnetic Casimir interaction between two spheres is studied within the scattering approach using the plane-wave basis. It is demonstrated that the proximity force approximation (PFA) corresponds to the specular-reflection limit of Mie scattering. Using the leading-order semiclassical WKB approximation for the direct reflection term in the Debye expansion for the scattering amplitudes, we prove that PFA provides the correct leading-order divergence for arbitrary materials and temperatures in the sphere-sphere and the plane-sphere geometry.