Change search
ReferencesLink to record
Permanent link

Direct link
Entropy production of a Brownian ellipsoid in the overdamped limit
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Number of Authors: 3
2016 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, E-ISSN 1550-2376, Vol. 93, no 1, 012132Article in journal (Refereed) Published
Abstract [en]

We analyze the translational and rotational motion of an ellipsoidal Brownian particle from the viewpoint of stochastic thermodynamics. The particle's Brownian motion is driven by external forces and torques and takes place in an heterogeneous thermal environment where friction coefficients and (local) temperature depend on space and time. Our analysis of the particle's stochastic thermodynamics is based on the entropy production associated with single particle trajectories. It is motivated by the recent discovery that the overdamped limit of vanishing inertia effects (as compared to viscous fricion) produces a so-called anomalous contribution to the entropy production, which has no counterpart in the overdamped approximation, when inertia effects are simply discarded. Here we show that rotational Brownian motion in the overdamped limit generates an additional contribution to the anomalous entropy. We calculate its specific form by performing a systematic singular perturbation analysis for the generating function of the entropy production. As a side result, we also obtain the (well-known) equations of motion in the overdamped limit. We furthermore investigate the effects of particle shape and give explicit expressions of the anomalous entropy for prolate and oblate spheroids and for near-spherical Brownian particles.

Place, publisher, year, edition, pages
2016. Vol. 93, no 1, 012132
National Category
Physical Sciences Mathematics
Identifiers
URN: urn:nbn:se:su:diva-126897DOI: 10.1103/PhysRevE.93.012132ISI: 000368517500009OAI: oai:DiVA.org:su-126897DiVA: diva2:903914
Available from: 2016-02-17 Created: 2016-02-16 Last updated: 2016-02-17Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Marino, RaffaeleEichhorn, Ralf
By organisation
Nordic Institute for Theoretical Physics (Nordita)
In the same journal
Physical Review E. Statistical, Nonlinear, and Soft Matter Physics
Physical SciencesMathematics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 10 hits
ReferencesLink to record
Permanent link

Direct link