Transient Casimir Forces from Quenches in Thermal and Active Matter
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PhysRevLett.118.015702.pdf
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Author(s)
Rohwer, Christian M.
Krüger, Matthias
Kardar, Mehran
Date Issued
January 2017
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Rohwer,Christian M.; Kardar,Mehran and Krüger, Matthias. "Transient Casimir Forces from Quenches in Thermal and Active Matter." Physical Review Letters 118, no. 015702 (January 2017): 1-5 © 2017 American Physical Society
Version
Final published version
Abstract
We compute fluctuation-induced (Casimir) forces for classical systems after a temperature quench. Using a generic coarse-grained model for fluctuations of a conserved density, we find that transient forces arise even if the initial and final states are force free. In setups reminiscent of Casimir (planar walls) and van der Waals (small inclusions) interactions, we find comparable exact universal expressions for the force. Dynamical details only scale the time axis of transient force curves. We propose that such quenches can be achieved, for instance, in experiments on active matter, employing tunable activity or interaction protocols.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.118.015702
