Theory of Casimir Forces without the Proximity-Force Approximation.


We analyze both the attractive and repulsive Casimir-Lifshitz forces recently reported in experimental investigations. By using a kinetic approach, we obtain the Casimir forces from the power absorbed by the materials. We consider collective material excitations through a set of relaxation times distributed in frequency according to a log-normal function. A generalized expression for these forces for arbitrary values of temperature is obtained. We compare our results with experimental measurements and conclude that the model goes beyond the proximity-force approximation.

DOI: 10.1103/PhysRevLett.116.110601

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@article{Lapas2016TheoryOC, title={Theory of Casimir Forces without the Proximity-Force Approximation.}, author={Luciano Calheiros Lapas and Agust{\'i}n P{\'e}rez-Madrid and J. Miguel Rubi}, journal={Physical review letters}, year={2016}, volume={116 11}, pages={110601} }