An upper bound on the fluctuations of a second class particle
| dc.creator | Seppalainen, Timo | |
| dc.date | 2002-05-15 | |
| dc.date.accessioned | 2026-07-07T04:48:32Z | |
| dc.date.available | 2026-07-07T04:48:32Z | |
| dc.description | This note proves an upper bound for the fluctuations of a second-class particle in the totally asymmetric simple exclusion process. The proof needs a lower tail estimate for the last-passage growth model associated with the exclusion process. A stronger estimate has been proved for the corresponding discrete time model, so we take the needed estimate as a hypothesis. The process is initially in local equilibrium with a slowly varying macroscopic profile. The macroscopic initial profile is smooth in a neighborhood of the origin where the second-class particle starts off, and the forward characteristic from the origin is not a shock. Given these assumptions, the result is that the typical fluctuation of the second-class particle is not of larger order than n^{2/3}(log n)^{1/3}, where n is the ratio of the macroscopic and microscopic space scales. The conjectured correct order should be n^{2/3}. Landim et al. have proved a lower bound of order n^{5/8} for more general asymmetric exclusion processes in equilibrium. Fluctuations in the case of shocks and rarefaction fans are covered by earlier results of Ferrari-Fontes and Ferrari-Kipnis. | |
| dc.description | 15 pages | |
| dc.identifier | https://arxiv.org/abs/math/0205176 | |
| dc.identifier | http://arxiv.org/abs/math/0205176 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/64084 | |
| dc.subject | Probability | |
| dc.subject | 60K35 | |
| dc.title | An upper bound on the fluctuations of a second class particle | |
| dc.type | text |