Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 31: Quantum Effects (QED)
Q 31.2: Vortrag
Dienstag, 6. März 2018, 14:15–14:30, K 1.013
Atom-surface interactions with nonlocal materials — •Francesco Intravaia1, Daniel Reiche1,2, and Kurt Busch1,2 — 1Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2A, 12489 Berlin, Germany — 2Humboldt-Universität zu Berlin, Institut für Physik, AG Theoretische Optik & Photonik, Newtonstr. 15, 12489 Berlin, Germany
The interaction between an atom and an extended body, such as a surface, is one of the oldest but also one of the most relevant problem of quantum physics. Indeed, due to the technological progress of recent years, atoms can be placed closer and closer to a material interface, which opens new horizons for quantum technologies and quantum-sensing. In this regime, however, some of the some of the simplifying assumptions used so far in the description of atom-surface interactions start to loose their validity. In particular the spatial dispersive properties of the material, neglected in most of the of the investigations reported in the literature, start to play a relevant role. Phenomena, such as the Landau damping, and new length scales, like the carrier’s mean free path or the Thomas-Fermi screening length, induce fascinating behaviors which are completely absent in a local description of the electro-optical properties of the material.
We discuss here some relevant effects and recent results, which show the relevance of spatial dispersion in atom-surface interactions. The focus is on dispersion forces (non-charged objects) and on the interplay of nonlocality with quantum mechanics and nonequilibrium physics.