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28 March 2024
 
  » arxiv » 1010.4881

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Anomalies, absence of local equilibrium and universality in 1-d particles systems
Claudio Giberti ; Lamberto Rondoni ;
Date 23 Oct 2010
AbstractOne dimensional systems are under intense investigation, both from theoretical and experimental points of view, since they have rather peculiar characteristics which are of both conceptual and technological interest. We analyze the dependence of the behaviour of one dimensional, time reversal invariant, nonequilibrium systems on the parameters defining their microscopic dynamics. In particular, we consider chains of identical oscillators interacting via hard core elastic collisions and harmonic potentials, driven by boundary Nose’-Hoover thermostats. Their behaviour mirrors that of stochastically driven systems, suggesting that anomalous properties may not be mere peculiarities of the theoretical models but be typical of physics in (approximately) one dimension. Chaos, by itslef, does not lead to standard behaviour: proper interactions among particles are needed for that. A link is found between density fluctuations and temperature profiles.
Source arXiv, 1010.4881
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