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Time walkers and spatial dynamics of aging information
Niels Bohr Institute.
Umeå University, Faculty of Science and Technology, Department of Physics.
Niels Bohr Institute.
2010 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 104, 040603- p.Article in journal (Refereed) Published
Abstract [en]

The distribution of information is essential for a living system’s ability to coordinate and adapt. Random walkers are often used to model this distribution process and, in doing so, one effectively assumes that information maintains its relevance over time. But the value of information in social and biological systems often decays and must continuously be updated. To capture the spatial dynamics of aging information, we introduce time walkers. A time walker moves like a random walker, but interacts with traces left by other walkers, some representing older information, some newer. The traces form a navigable information landscape which we visualize as a river network. We quantify the dynamical properties of time walkers, and the quality of the information left behind, on a two-dimensional lattice. We show that searching in this landscape is superior to random searching.

Place, publisher, year, edition, pages
2010. Vol. 104, 040603- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-36656DOI: 10.1103/PhysRevLett.104.040603ISI: 000274336600009OAI: oai:DiVA.org:umu-36656DiVA: diva2:355476
Available from: 2010-10-06 Created: 2010-10-06 Last updated: 2017-12-12

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