Experimental Test of a New Equality: Measuring Heat Dissipation in an Optically Driven Colloidal System

Details Experimental Test of a New Equality: Measuring Heat Dissipation in an Optically Driven Colloidal System Experimental Test of a New Equality: Measuring Heat Dissipation in an Optically Driven Colloidal System

2006-08-18

arxiv.org/abs/cond-mat/0608415v3

Physics

Condensed Matter

Statistical Mechanics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevE.75.011122

Measurement of energy dissipation in small nonequilibrium systems is generally a difficult task. Recently, Harada and Sasa [Phys.Rev.Lett. 95, 130602(2005)] derived an equality relating the energy dissipation rate to experimentally accessible quantities in nonequilibrium steady states described by the Langevin equation. Here, we show the first experimental test of this new relation in an optically driven colloidal system. We find that this equality is validated to a fairly good extent, thus the irreversible work of a small system is estimated from readily obtainable quantities.

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