Linear response relations in fluctuational electrodynamics
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Golyk-2013-Linear response relations.pdf
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Author(s)
Golyk, Vladyslav A.
Kardar, Mehran
Krueger, Matthias Helmut Guenter
Date Issued
October 2013
Journal
Physical Review B
Publisher
American Physical Society
Citation
Golyk, Vladyslav A., Matthias Kruger, and Mehran Kardar. “Linear Response Relations in Fluctuational Electrodynamics.” Phys. Rev. B 88, no. 15 (October 2013). © 2013 American Physical Society
Version
Final published version
Abstract
Near field radiative heat transfer and vacuum friction are just two instances of topics of technological and fundamental interest studied via the formalism of fluctuational electrodynamics. From the perspective of experiment and simulations, it is hard to precisely control and probe such nonequilibrium situations. Fluctuations in equilibrium are easier to measure, and typically can be related to nonequilibrium response functions by Green-Kubo relations. We consider a collection of arbitrary objects in vacuum, perturbed by changing the temperature or velocity of one object. Developing a method for computation of higher order correlation functions in fluctuational electrodynamics, we explicitly compare linear response and equilibrium fluctuations. We obtain a Green-Kubo relation for the radiative heat transfer, as well as a closed formula for the vacuum friction in arbitrary geometries in the framework of scattering theory. We comment on the signature of the radiative heat conductivity in equilibrium fluctuations.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.88.155117
