n-body problem

(redirected from Many-particle system)

n-body problem

Any problem in celestial mechanics that involves the determination of the trajectories of n point masses whose only interaction is gravitational attraction. The bodies in the Solar System are an example if it is assumed that the masses of the planets, etc., are concentrated at their centers of mass. A general solution exists for the two-body problem and in special cases a solution can be found for the three-body problem. The complete solution for a larger number is normally considered impossible.

n-body problem

[′en ¦bad·ē ‚präb·ləm]
(mechanics)
References in periodicals archive ?
He introduces this specialty of theoretical physics to students and scientists, focusing on applications in solid-state physics, plasma physics, subatomic physics, and other areas where correlations are of relevance to many-particle systems.
Chapters on topics including the basic postulates of quantum mechanics, Schrodinger equations, many-particle systems, and relativity now include worked examples and problems.
Among the topics are the validity of random matrix theories for many-particle systems, the angular-momentum dependence of the density of states, group theory and the propagation of operator averages, electromagnetic sum rules by spectral distribution methods, compound-nuclear tests of time reversal invariance in the nucleon-nucleon interaction, strength functions and spreading widths of simple shell model configurations, and underlying symmetries of realistic interactions and the nuclear many-body problem.