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- W2317486501 abstract "We report a systematic study of the effects of the external force F on the nonequilibrium steady-state (NESS) dynamics of the diffusing particles over a tilted periodic potential, in which detailed balance is broken due to the presence of a steady particle flux. A tilted two-layer colloidal system is constructed for this study. The periodic potential is provided by the bottom-layer colloidal spheres forming a fixed crystalline pattern on a glass substrate. The corrugated surface of the bottom colloidal crystal provides a gravitational potential field for the top-layer diffusing particles. By tilting the sample at an angle θ with respect to the vertical (gravity) direction, a tangential component of the gravitational force F is applied to the diffusing particles. The measured NESS probability density function P(ss)(x,y) of the particles is found to deviate from the equilibrium distribution P(x,y) to a different extent, depending on the driving or distance from equilibrium. The experimental results are compared with the exact solution of the one-dimensional (1D) Smoluchowski equation and the numerical results of the 2D Smoluchowski equation. From the obtained exact solution of the 1D Smoluchowski equation, we develop an analytical method to accurately extract the 1D potential U(0)(x) from the measured P(ss)(x). This work demonstrates that the tilted periodic potential provides a useful platform for the study of forced barrier-crossing dynamics beyond the Arrhenius-Kramers equation." @default.
- W2317486501 created "2016-06-24" @default.
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- W2317486501 date "2015-04-13" @default.
- W2317486501 modified "2023-10-17" @default.
- W2317486501 title "Colloidal dynamics over a tilted periodic potential: Nonequilibrium steady-state distributions" @default.
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- W2317486501 doi "https://doi.org/10.1103/physreve.91.042306" @default.
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- W2317486501 hasPublicationYear "2015" @default.
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