Evolution on a Rugged Landscape: Pinning and Aging
- Bar Ilan University, Ramat Gan 52900 (Israel)
- Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)
- Institute for Nonlinear Science, University of California, San Diego, La Jolla, California 92093-0402 (United States)
Population dynamics on a rugged landscape is studied analytically and numerically. The dynamics of the population is described in terms of Langevin diffusion of a single particle in a specific random environment. The randomness in the mutation rate leads to population pinning and to a logarithmic slowdown of the evolution, resembling aging phenomenon in spin glass systems. Individual realizations of evolutionary behavior exhibit so-called punctuated equilibria, or long periods of stasis interrupted by rapid changes of fitness. In contrast, the randomness in the replication rate turns out to be irrelevant for evolution in the long-time limit as it is smoothed out by increasing {open_quotes}evolution temperature.{close_quotes} {copyright} {ital 1997} {ital The American Physical Society}
- DOE Contract Number:
- FG03-96ER14592; W-31109-ENG-38
- OSTI ID:
- 543872
- Journal Information:
- Physical Review Letters, Vol. 79, Issue 17; Other Information: PBD: Oct 1997
- Country of Publication:
- United States
- Language:
- English
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