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arXiv · 2009.11003

Non-trivial retardation effects in dispersion forces: From anomalous distance dependence to novel traps

Johannes Fiedler·Kristian Berland·Fabian Spallek·Iver Brevik·Clas Persson·Stefan Yoshi Buhmann·Mathias Boström
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Abstract

In the study of dispersion forces, nonretarded, retarded and thermal asymptotes with their distinct scaling laws are regarded as cornerstone results governing interactions at different separations. Here, we show that when particles interact in a medium, the influence of retardation is qualitatively different, making it necessary to consider the non-monotonous potential in full. We discuss different regimes for several cases and find an anomalous behaviour of the retarded asymptote. It can change sign, and lead to a trapping potential.

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Johannes Fiedler, Kristian Berland, Fabian Spallek, Iver Brevik, Clas Persson, Stefan Yoshi Buhmann, Mathias Boström. 2020-09-23. Non-trivial retardation effects in dispersion forces: From anomalous distance dependence to novel traps. https://doi.org/10.1103/physrevb.101.235424

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