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The '''Fermi-Pasta-Ulam experiment''' <ref>[http://lib-www.lanl.gov/cgi-bin/getfile?00353569.pdf Enrico Fermi, John R. Pasta and Stanislaw M. Ulam "Studies of nonlinear problems I", Los Alamos Scientific Laboratory Report '''LA-1940''' (1955)]</ref> consisted of a one dimensional system composed of 64 particles, whose ends were fixed, and the particles were connected by a selection of forces; quadratic, cubic, and "broken"-linear. Their main finding was that there was an apparent lack of [[equipartition]] of energy amongst the available [[Degree of freedom | degrees of freedom]], even after as many as 10,000 cycles on their fast electronic computing machine (MANIAC I).
<br>[[Image:FPU_experiment.png|1000px]]<br>
==See also==
*[[Ergodic hypothesis]]
==References==
==References==
<references/>
#[http://lib-www.lanl.gov/cgi-bin/getfile?00353569.pdf Enrico Fermi and John R. Pasta and Stanislaw M. Ulam "Studies of the nonlinear problems", Los Alamos Scientific Laboratory Report '''LA-1940''' (1955)]
'''Related reading'''
#[http://dx.doi.org/10.1088/0143-0807/26/5/S01 Thierry Dauxois, Michel Peyrard and Stefano Ruffo "The Fermi–Pasta–Ulam 'numerical experiment': history and pedagogical perspectives", European Journal of Physics '''26''' pp. S3-S11 (2005)]
*[http://dx.doi.org/10.1088/0143-0807/26/5/S01 Thierry Dauxois, Michel Peyrard and Stefano Ruffo "The Fermi–Pasta–Ulam 'numerical experiment': history and pedagogical perspectives", European Journal of Physics '''26''' pp. S3-S11 (2005)]
#[http://dx.doi.org/10.1038/435281a Mark Buchanan "Capturing chaos", Nature '''435''' p. 281 (2005)]
*[http://dx.doi.org/10.1038/435281a Mark Buchanan "Capturing chaos", Nature '''435''' p. 281 (2005)]
See Chaos: An Interdisciplinary Journal of Nonlinear Science , [http://scitation.aip.org/dbt/dbt.jsp?KEY=CHAOEH&Volume=15&Issue=1 March 2005] "FOCUS ISSUE: THE "FERMI-PASTA-ULAM" PROBLEM-THE FIRST 50 YEARS":
*[http://scitation.aip.org/dbt/dbt.jsp?KEY=CHAOEH&Volume=15&Issue=1 "FOCUS ISSUE: THE "FERMI-PASTA-ULAM" PROBLEM-THE FIRST 50 YEARS", Chaos: An Interdisciplinary Journal of Nonlinear Science '''15''' March (2005)]
#[http://dx.doi.org/10.1063/1.1855036    G. P. Berman and F. M. Izrailev "The Fermi–Pasta–Ulam problem: Fifty years of progress",  Chaos: An Interdisciplinary Journal of Nonlinear Science '''15''' 015104 (2005)]
*[http://dx.doi.org/10.1063/1.1855036    G. P. Berman and F. M. Izrailev "The Fermi–Pasta–Ulam problem: Fifty years of progress",  Chaos: An Interdisciplinary Journal of Nonlinear Science '''15''' 015104 (2005)]
*[http://dx.doi.org/10.1007/978-3-540-72995-2 "The Fermi-Pasta-Ulam Problem: A Status Report" Lecture Notes in Physics '''728/2008''' Springer (2008)]
*[http://dx.doi.org/10.1511/2009.78.214 Mason A. Porter, Norman J. Zabusky, Bambi Hu, and David K. Campbell "Fermi, Pasta, Ulam and the Birth of Experimental Mathematics", American Scientist '''97''' pp. 214-221 (2009)]
*[http://dx.doi.org/10.4249/scholarpedia.5538 Thierry Dauxois and Stefano Ruffo "Fermi-Pasta-Ulam nonlinear lattice oscillations", Scholarpedia, 3(8):5538 (2008)]
*[http://dx.doi.org/10.4249/scholarpedia.9217 Bob Rink "Fermi Pasta Ulam systems (FPU): mathematical aspects", Scholarpedia, 4(12):9217 (2009)]
*[http://dx.doi.org/10.1063/1.2835154 Thierry Dauxois "Fermi, Pasta, Ulam, and a mysterious lady",  Physics Today '''61''' (1) pp. 55-57 (2008)]
[[category: statistical mechanics]]
[[category: statistical mechanics]]
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