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Anomalous Fluctuations in the Motion of Partitioning Objects

DelRe, E. and Di Sabatino, S. and Di Porto, P. and Crosignani, B. (2014) Anomalous Fluctuations in the Motion of Partitioning Objects. Journal of Statistical Physics, 156 (2). pp. 291-300. ISSN 0022-4715. doi:10.1007/s10955-014-1001-3.

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We study how an object that partitions in two its thermally agitated environment relaxes to its equilibrium fluctuations. Event-driven molecular dynamics indicate that a conventional diffusive-like bound-Brownian motion is reached after a long-lived sub-diffusive regime. The two-stage behavior is not eliminated increasing the number of agitated particles, suggesting that the origin of the effect is a topologically frustrated exploration of phase-space.

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Additional Information:© 2014 Springer Science+Business Media New York. Received: 6 November 2013; Accepted: 15 April 2014; Published online: 6 May 2014. We thank Angelo Vulpiani for useful discussions. Stefano Di Sabatino is now with LPT-IRSAMC, Université Paul Sabatier - Toulouse, France. The research leading to these results was supported by funding from the Italian Ministry of Research (MIUR) through the “Futuro in Ricerca” FIRB Grant PHOCOS-RBFR08E7VA. Partial funding was received through the SMARTCONFOCAL project of the Regione Lazio and through the PRIN Project No. 2012BFNWZ2.
Funding AgencyGrant Number
Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)PHOCOS-RBFR08E7VA
Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)2012BFNWZ2
Subject Keywords:Partitioning particle; Brownian motion; Power laws; Sub-diffusion; Adiabatic piston
Issue or Number:2
Record Number:CaltechAUTHORS:20140707-095334275
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Official Citation:DelRe, E., Di Sabatino, S., Di Porto, P. et al. J Stat Phys (2014) 156: 291. doi:10.1007/s10955-014-1001-3
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46873
Deposited By: Tony Diaz
Deposited On:07 Jul 2014 19:50
Last Modified:10 Nov 2021 17:30

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