Document Type : Original Article
Authors
1 Department of Physics, University of Guilan, P.O. Box 41335-1914, Rasht, Iran
2 Department of Physics, Cavendish Laboratory, University of Cambridge
Abstract
One simple combination of particles which captures effect of hydrodynamics interactions consists of two trapped beads, immersed in fluid, each with a single degree of freedom, and fluctuating around their equilibrium positions. Given such a system in the presence of a flat boundary, we consider effect of an external electrical or temperature field on it. The external field push the two beads system, out of equilibrium. We calculate beads’ auto/cross correlations in the presence of external field, then investigate if these auto/cross correlations can be used to reveal the presence of a possible external field, and its nature. We find that the former question could be answered successfully, while the latter requires more information or degrees of freedom for beads and the observer.
Keywords
- Nonequilibrium correlations
- hydrodynamics interactions
- Langevin equation
- external field
- flat boundary
Main Subjects
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