DescriptionTime evolution of energy for FPUT N-body dynamics.jpg
English: This file contains a photograph of a plot from the original work of Fermi and coworkers. This work was among the first uses of the molecular dynamics method for understanding the statistical properties of matter, and it contributed heavily to the field of chaos. More information can be found by researching the Fermi-Pasta-Ulam-Tsingou problem.
Date
Source
This is a photo of a plot from a scientific document that is in the public domain. Specifically, the document is a report released from Los Alamos National Labotatory from 1955, and is not published by a scientific journal. The citation is: Fermi, E.; Pasta, J.; Ulam, S. (1955). "Studies of Nonlinear Problems" (PDF). Document LA-1940. Los Alamos National Laboratory. I assume this qualifies as a work of the US Federal Government.
Author
I don't know who took the photo, but it is a photo of a plot from a scientific paper so anyone could have taken it. (It could have been taken by me, for example, but there is no way to tell.)
Unless otherwise indicated, this information has been authored by an employee or employees of the Los Alamos National Security, LLC (LANS), operator of the Los Alamos National Laboratory under Contract No. DE-AC52-06NA25396 with the U.S. Department of Energy. The U.S. Government has rights to use, reproduce, and distribute this information. The public may copy and use this information without charge, provided that this Notice and any statement of authorship are reproduced on all copies. Neither the Government nor LANS makes any warranty, express or implied, or assumes any liability or responsibility for the use of this information.
Please note that national laboratories operate under varying licences and some are not free. Checkthe site policies of any national lab before crediting it with this tag.
Unless otherwise indicated, this information has been authored by an employee or employees of the Los Alamos National Security, LLC (LANS), operator of the Los Alamos National Laboratory under Contract No. DE-AC52-06NA25396 with the U.S. Department of Energy. The U.S. Government has rights to use, reproduce, and distribute this information. The public may copy and use this information without charge, provided that this Notice and any statement of authorship are reproduced on all copies. Neither the Government nor LANS makes any warranty, express or implied, or assumes any liability or responsibility for the use of this information.
Captions
One of the earliest simulations of an N-body system as carried out on the MANIAC-I by Fermi and coworkers to understand the origins of irreversibilty in nature.