Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster: Quantum Optics and Photonics II

Q 27.30: Poster

Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof

Quantum reflection off periodically structured surfaces — •Tobias Nitschke, Benjamin A. Stickler, and Klaus Hornberger — Fakultät für Physik, Universität Duisburg-Essen, Deutschland

We present a theoretical study of quantum reflection, i.e. the classically forbidden reflection of matter waves from an attractive potential [1], of polarizable point particles off periodically shaped surfaces. The Casimir-Polder interaction between the particle and the surface allows us to express the transmitted waves in terms of rotated WKB waves close to the surface. Using them as boundary conditions, we formulate the theory of quantum reflection and interference of matter waves from arbitrarily shaped, periodic surface structures. The resulting diffraction pattern is obtained by numerically solving the Schrödinger equation.

[1] H. Friedrich, J. Trost: Working with WKB waves far from the semi-classical limit, Phys. Rep. 397, 6 (2004)