Physics Colloquium - Friday, Sept. 7th, 2007,
Center; Refreshments at 3:30 P.M. in
Statistical Physics of Citations
Department of Physics
This talk will begin with basic empirical facts about the network of
scientific citations, based on all Physical Review publications from the
110 years. Intriguingly, the evolution of citations appears to be described
by nearly linear preferential attachment. A master equation approach will
presented to characterize the citation distribution and related
popularity-driven networks. The conditions that lead to exponential,
power-law, or more singular citation distributions will be elucidated for
general classes of networks. The citation data of Physical Review also
reveals many interesting features that motivate new theoretical models.
Finally, the Google page-rank analysis of citations will be applied to find
"hidden gems" in Physical Review publications.