Collision of particle patterns in dissipative systems

Particle patterns mean any spatially localized structures sustained by the balance between inflow and outflow of energy/material which arise in the form of chemical blob, discharge pattern, morphological spot, and binary convection cell. These are modeled by typically three-component reaction diffusion systems or a couple of complex GL equations with concentration field. Strong interaction such as collision among particle patterns is a big challenge, since dissipative systems do not have many conservative quantities. Unlike weak-interaction through tails of those objects, there are so far no systematic methods to handle them because of large deformation of patterns during the collision process. We present a new approach to clarify a backbone structure behind the complicated transient collision process. A key ingredient lies in a hidden network of unstable solutions called scattors which play a a crucial role to understand the input-output relation for collision process (namely the relation of two dynamics before and after collision). More precisely, the associated network of scattors via heteroclinic connections forms a backbone for the whole collisional dynamics. It should be noted that collision dynamics for traveling breathers depends the phase differnce of those waves (see [3]). The viewpoint of scattor network seems quite useful for a large class of model systems arising in gas-discharge phenomena, chemical blobs, and binary fluid convection.

Relevant reference from our group:

[1] Y. Nishiura, T. Teramoto and K.-I. Ueda: "Scattering and separators in dissipative systems", Phys. Rev. E, 67: 056210 (2003)

[2] Y. Nishiura, T. Teramoto and K.-I. Ueda: "Dynamic transitions through scattors in dissipative systems", Chaos, 13(3): 962-972 (2003)

[3] T. Teramoto, K.-I. Ueda and Y. Nishiura: "Phase-dependent output of scattering process for traveling breathers", Phys. Rev. E, 69(4): 056224 (2004)

[4] Y. Nishiura, T. Teramoto and K.-I. Ueda: "Scattering of traveling spots in dissipative systems",
Chaos, 15: 047509-047519 (2005)

[5] T. Teramoto, K.-I. Ueda and Y. Nishiura
Breathing Scattors in Dissipative Systems, Progress of Theoretical Physics Supplement No.161(2006)pp364-pp367.