Boundary Information Inflow Enhances Correlation in Flocking (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Boundary Information Inflow Enhances Correlation in Flocking (Articolo in rivista) (literal)

Anno

• 2013-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1103/PhysRevLett.110.168107 (literal)

Alternative label

• Andrea Cavagna (1); Irene Giardina (1); Francesco Ginelli (1,2) (2013)
  Boundary Information Inflow Enhances Correlation in Flocking
  in Physical review letters (Print)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Andrea Cavagna (1); Irene Giardina (1); Francesco Ginelli (1,2) (literal)

Pagina inizio

• 168107 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

• http://prl.aps.org/abstract/PRL/v110/i16/e168107 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 110 (literal)

Rivista

• Physical review letters (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 5 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 16 (literal)

Note

• Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• (1) Istituto dei Sistemi Complessi, CNR, via dei Taurini 19, I-00185 Roma, Italy (2) SUPA, Institute for Complex Systems and Mathematical Biology, King's College, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom (literal)

Titolo

• Boundary Information Inflow Enhances Correlation in Flocking (literal)

Abstract

• The most conspicuous trait of collective animal behavior is the emergence of highly ordered structures. Less obvious to the eye, but perhaps more profound a signature of self-organization, is the presence of long-range spatial correlations. Experimental data on starling flocks in 3D show that the exponent ruling the decay of the velocity correlation function, C(r)?1/r?, is extremely small, ? 1. This result can neither be explained by equilibrium field theory nor by off-equilibrium theories and simulations of active systems. Here, by means of numerical simulations and theoretical calculations, we show that a dynamical field applied to the boundary of a set of Heisenberg spins on a 3D lattice gives rise to a vanishing exponent ?, as in starling flocks. The effect of the dynamical field is to create an information inflow from border to bulk that triggers long-range spin-wave modes, thus giving rise to an anomalously long-ranged correlation. The biological origin of this phenomenon can be either exogenous - information produced by environmental perturbations is transferred from boundary to bulk of the flock - or endogenous - the flock keeps itself in a constant state of dynamical excitation that is beneficial to correlation and collective response. (literal)

Prodotto di

• Applicazioni interdisciplinari della meccanica statistica in sistemi complessi di origine fisica e biologica (MD.P02.013.001) (Modulo)

Autore CNR

• FRANCESCO GIULIO GINELLI (Persona)
• ANDREA CAVAGNA (Persona)
• IRENE ROSANA GIARDINA (Persona)

Incoming links:

Autore CNR di

• ANDREA CAVAGNA (Persona)
• IRENE ROSANA GIARDINA (Persona)
• FRANCESCO GIULIO GINELLI (Persona)

Prodotto

• Applicazioni interdisciplinari della meccanica statistica in sistemi complessi di origine fisica e biologica (MD.P02.013.001) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Physical review letters (Rivista)