Influence of noise on force measurements

Date
2010-04
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Source Title
Physical Review Letters
Print ISSN
0031-9007
Electronic ISSN
1079-7114
Publisher
The American Physical Society
Volume
104
Issue
17
Pages
1 - 4
Language
English
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Abstract

We demonstrate how the ineluctable presence of thermal noise alters the measurement of forces acting on microscopic and nanoscopic objects. We quantify this effect exemplarily for a Brownian particle near a wall subjected to gravitational and electrostatic forces. Our results demonstrate that the forcemeasurement process is prone to artifacts if the noise is not correctly taken into account.

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