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dc.date.accessioned | 2019-11-29T17:26:57Z | |
dc.date.available | 2019-11-29T17:26:57Z | |
dc.date.issued | 2015 | |
dc.identifier.uri | http://sedici.unlp.edu.ar/handle/10915/86400 | |
dc.description.abstract | Experiments find coherent information transfer through biological groups on length and time scales distinctly below those on which asymptotically correct hydrodynamic theories apply. We present here a new continuum theory of collective motion coupling the velocity and density fields of Toner and Tu to the inertial spin field recently introduced to describe information propagation in natural flocks of birds. The long-wavelength limit of the new equations reproduces the Toner-Tu theory, while at shorter wavelengths (or, equivalently, smaller damping), spin fluctuations dominate over density fluctuations, and second-sound propagation of the kind observed in real flocks emerges. We study the dispersion relation of the new theory and find that when the speed of second sound is large, a gap in momentum space sharply separates first- from second-sound modes. This gap implies the existence of silent flocks, namely, of medium-sized systems across which information cannot propagate in a linear and underdamped way, either under the form of orientational fluctuations or under that of density fluctuations, making it hard for the group to achieve coordination. | en |
dc.language | en | es |
dc.subject | Grupos biológicos | es |
dc.subject | Dispersión | es |
dc.title | Silent flocks: Constraints on signal propagation across biological groups | en |
dc.type | Articulo | es |
sedici.identifier.other | doi:10.1103/PhysRevLett.114.218101 | es |
sedici.identifier.other | eid:2-s2.0-84931282123 | es |
sedici.identifier.issn | 0031-9007 | es |
sedici.creator.person | Cavagna, A. | es |
sedici.creator.person | Giardina, I. | es |
sedici.creator.person | Grigera, Tomás Sebastián | es |
sedici.creator.person | Jelic, A. | es |
sedici.creator.person | Levine, D. | es |
sedici.creator.person | Ramaswamy, S. | es |
sedici.creator.person | Viale, M. | es |
sedici.subject.materias | Biología | es |
sedici.description.fulltext | true | es |
mods.originInfo.place | Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas | es |
mods.originInfo.place | Facultad de Ciencias Exactas | es |
sedici.subtype | Articulo | es |
sedici.rights.license | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
sedici.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
sedici.description.peerReview | peer-review | es |
sedici.relation.journalTitle | Physical Review Letters | es |
sedici.relation.journalVolumeAndIssue | vol. 114, no. 21 | es |
sedici.rights.sherpa | * Color: green * Pre-print del autor: can * Post-print del autor: can * Versión de editor/PDF:can * Condiciones: >>On author's personal website, employer's website or institutional repository >>Institutional repository must not be shared with other institutions >>Publisher's version/PDF may be used >>Link to publisher version required >>Publisher copyright and source must be acknowledged with citation * Link a Sherpa: http://sherpa.ac.uk/romeo/issn/0031-9007/es/ |