Dilution and resonance-enhanced repulsion in nonequilibrium fluctuation forces
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Bimonte-2011-Computing Confidence Intervals for Point Process Models.pdf
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Author(s)
Bimonte, Giuseppe
Emig, Thorsten
Krueger, Matthias Helmut Guenter
Kardar, Mehran
Date Issued
October 2011
Journal
Physical Review A
Publisher
American Physical Society (APS)
Citation
Bimonte, Giuseppe et al. “Dilution and Resonance-enhanced Repulsion in Nonequilibrium Fluctuation Forces.” Physical Review A 84.4 (2011): n. pag. Web. 16 Feb. 2012. © 2011 American Physical Society
Version
Final published version
Abstract
In equilibrium, forces induced by fluctuations of the electromagnetic field between electrically polarizable objects (microscopic or macroscopic) in vacuum are generically attractive. The force may, however, become repulsive for microscopic particles coupled to thermal baths with different temperatures. We demonstrate that this nonequilibrium repulsion can be realized also between macroscopic objects, as planar slabs, if they are kept at different temperatures. It is shown that repulsion can be enhanced by (i) tuning of material resonances in the thermal region and by (ii) reducing the dielectric contrast due to “dilution.” This can lead to stable equilibrium positions. We discuss the realization of these effects for aerogels, yielding repulsion down to submicron distances at realistic porosities.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevA.84.042503
