Abstract
Avalanche dynamics is an indispensable feature of complex systems. Here, we study the self-organized critical dynamics of avalanches on scale-free networks with degree exponent γ through the Bak-Tang-Wiesenfeld (BTW) sandpile model. The threshold height of a node i is set as ki 1-η with 0≤ η < 1, where ki is the degree of node i. Using the branching process approach, we obtain the avalanche size and the duration distribution of sand toppling, which follow power-laws with exponents τ and δ, respectively. They are given as τ=(γ - 2η)/(γ - 1 - η) and δ=(γ - 1 - η)/(γ - 2) for γ < 3- η, 3/2 and 2 for γ > 3 - η, respectively. The power-law distributions are modified by a logarithmic correction at γ = 3 - η.
Original language | English |
---|---|
Pages (from-to) | 84-91 |
Number of pages | 8 |
Journal | Physica A: Statistical Mechanics and its Applications |
Volume | 338 |
Issue number | 1-2 SPEC. ISS. |
DOIs | |
Publication status | Published - 2004 Jul 1 |
Externally published | Yes |
Keywords
- Avalanche
- Branching process
- Scale-free network
ASJC Scopus subject areas
- Statistics and Probability
- Condensed Matter Physics