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Comment on "Influence of Noise on Force Measurement" [arXiv:1004.0874]

Mannella, Riccardo and McClintock, P. V. E. (2010) Comment on "Influence of Noise on Force Measurement" [arXiv:1004.0874]. arXiv .

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SUMMARY In a recent Letter [arXiv:1004.0874], Volpe et al. describe experiments on a colloidal particle near a wall in the presence of a gravitational field for which they study the influence of noise on the measurement of force. Their central result is a striking discrepancy between the forces derived from experimental drift measurements via their Eq. (1), and from the equilibrium distribution. From this discrepancy they infer the stochastic calculus realised in the system. We comment, however: (a) that Eq. (1) does not hold for space-dependent diffusion, and corrections should be introduced; and (b) that the "force" derived from the drift need not coincide with the "force" obtained from the equilibrium distribution.

Item Type: Article
Additional Information: Imported from arXiv
Subjects: Area02 - Scienze fisiche > FIS/03 - Fisica della materia
Divisions: Dipartimenti (from 2013) > DIPARTIMENTO DI FISICA
Depositing User: dott.ssa Sandra Faita
Date Deposited: 06 Aug 2013 12:57
Last Modified: 10 Sep 2013 16:49
URI: http://eprints.adm.unipi.it/id/eprint/1437

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