Eur. Phys. J. B (2012) 85: 154
https://doi.org/10.1140/epjb/e2012-21008-5

Regular Article

Critical fluctuations in the Bak-Sneppen model

¹ Department of Computer Science, Central China Normal University, Wuhan 430079, P.R. China
² Institute of Particle Physics, Central China Normal University, Wuhan 430079, P.R. China
³ Key Laboratory of Quark and Lepton Physics (CCNU), Ministry of Education, Wuhan 430079, P.R. China

^a e-mail: cbyang@mail.ccnu.edu.cn

Received: 9 December 2011
Received in final form: 17 January 2012
Published online: 16 May 2012

Abstract

The critical fluctuation properties of fitness distribution in one-dimensional Bak-Sneppen model are studied in terms of the normalized factorial moments and erraticity moments. For a fitness window above the critical gap, no anomaly scaling of the moments is found, while for a window below the gap intermittent behaviors are observed. The scaling exponent for the BS model is different from that in two dimensional Ising model for second order phase transition.