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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics I
Q 31.58: Poster
Dienstag, 7. März 2017, 17:00–19:00, P OG1+2
Quantum Friction with Hyperbolic Structures — •Marty Oelschläger1,2, Francesco Intravaia1, and Kurt Busch1,2 — 1Max-Born-Institut, 12489 Berlin, Germany — 2Institut für Physik, Humboldt Universität zu Berlin, 12489 Berlin, Germany
One crucial difference between classical and quantum physics is the concept of vacuum, which in the quantum description is not empty but pervaded by roiling fluctuations. These give rise to a plethora of phenomena of which the best known are van der Waals/Casimir-Polder forces. Recently, there has been a resurgent and growing interest in non-equilibrium fluctuation-induced phenomena and in particular in quantum-friction. Unlike the classical case quantum friction does not involve any contact between the objects and the force is mediated by the interaction with the vacuum fluctuations of the quantum electromagnetic field. Importantly, vacuum is not immutable and its structure can be modified with solids and nano-structures. In this work we consider quantum friction between an atom moving at constant velocity parallel to the surface of a hyperbolic material made of alternating metallic and insulating layers. We investigate the behaviour of the frictional force as function of the atomic velocity and of the distance from the surface and compare them with the expressions for the non-structured system. Special attention is paid to the role of widely used treatments based on the Markov, the local thermal equilibrium and/or the effective medium approximation.