Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Perturbation Spreading in Many-Particle Systems: A Random Walk Approach

There are no MPG-Authors in the publication available
External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Zaburdaev, V., Denisov, S., & Haenggi, P. (2011). Perturbation Spreading in Many-Particle Systems: A Random Walk Approach. Physical Review Letters, 106(18): 180601. doi:10.1103/PhysRevLett.106.180601.

Cite as: https://hdl.handle.net/21.11116/0000-0008-6172-A
The propagation of an initially localized perturbation via an interacting many-particle Hamiltonian dynamics is investigated. We argue that the propagation of the perturbation can be captured by the use of a continuous-time random walk where a single particle is traveling through an active, fluctuating medium. Employing two archetype ergodic many-particle systems, namely, (i) a hard-point gas composed of two unequal masses and (ii) a Fermi-Pasta-Ulam chain, we demonstrate that the corresponding perturbation profiles coincide with the diffusion profiles of the single-particle Levy walk approach. The parameters of the random walk can be related through elementary algebraic expressions to the physical parameters of the corresponding test many-body systems.