Noise, Diffusion, and Hyperuniformity.

We consider driven many-particle models which have a phase transition between an active and an absorbing phase. Like previously studied models, we have particle conservation, but here we introduce an additional symmetry-when two particles interact, we give them stochastic kicks which conserve the center of mass. We find that the density fluctuations in the active phase decay in the fastest manner possible for a disordered isotropic system, and we present arguments that the large scale fluctuations are determined by a competition between a noise term which generates fluctuations, and a deterministic term which reduces them. Our results may be relevant to shear experiments and may further the understanding of hyperuniformity which occurs at the critical point.

• Publication year

  2016

• Venue

  Physical Review Letters

• Publication date

  2016-11-08

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/PhysRevLett.118.020601arXiv 1611.02386PMID 28128632
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

• and s

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