Microscopic noise, adaptation and survival in hostile environments

被引：0
作者：
Y. Louzoun
N. M. Shnerb
S. Solomon
机构：
[1] Bar-Ilan University,Department of Mathematics
[2] Bar-Ilan University,Department of Physics
[3] Racah Institute of Physics,undefined
[4] Hebrew University of Jerusalem,undefined
[5] Israel and Lagrange Laboratory for Excellence in Complexity,undefined
来源：
The European Physical Journal B | 2007年 / 56卷
关键词：
05.40.-a Fluctuation phenomena, random processes, noise, and Brownian motion; 64.60.Ak Renormalization-group, fractal, and percolation studies of phase transitions; 64.60.Ht Dynamic critical phenomena;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The survival of autocatalytic agents in hostile environments depends on their ability to adapt their spatial configuration to local fluctuations. A model of diffusive reactants that extract the advantage of spatio-temporal fluctuations associated with the stochastic wandering of diffusive catalysts is discussed. Two arguments are presented for the basic processes behind this extraordinary behavior. In the first, the local colonies that evolve around any spatially advantageous region overlap in space-time and an infinite directed percolation cluster emerges. The second argument is based on the return probability of a diffusive agent that is shown to yield finite density of active “oases" with an exponentially large contribution to the reactant population. The different range of applicability of these survival lower bounds to small systems is discussed.
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页码：141 / 148
页数：7
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共 15 条
[1]  
Zon undefined(2005)undefined Phys. Rev. Lett. 94 128103-undefined
[2]  
Togashi undefined(2004)undefined Phys. Rev. E 70 020901-undefined
[3]  
Brunet undefined(2001)undefined J. Stat. Phys. 103 269-undefined
[4]  
Cardy undefined(1996)undefined Phys. Rev. Lett. 77 4780-undefined
[5]  
Shnerb undefined(2000)undefined Proc. Natl. Acad. Sci. 97 10322-undefined
[6]  
Grassberger undefined(1982)undefined Z. Phys. B: Condens. Matter 47 465-undefined
[7]  
Shnerb undefined(2001)undefined Phys. Rev. E 63 021103-undefined
[8]  
Agranovich undefined(2006)undefined J. Theoretical Biolgy 241 309-undefined
[9]  
Kesten undefined(2003)undefined Electr. J. Prob. 8 1-undefined
[10]  
Majumdar undefined(1996)undefined Phys. Rev. Lett. 77 2867-undefined
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