ISSN:
1572-9613
Keywords:
Normal form
;
noise
;
thermal counterflow
;
TI–TII transition
;
noise-induced transition
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Noise may be used as a probe of the dynamics of a nonlinear system. Weak noise provides information on the local dynamics near a transition. This information can be helpful for identifying the underlying bifurcation. The normal form of the bifurcation can then be used as a starting point for a phenomenological model of the system. Such an approach furnishes a unified explanation of the experimental data near the transition between superfluid turbulent states TI and TII in liquid helium counterflow. Strong external noise probes global features of the nonlinearities of a system. It may also dramatically affect the dynamical behavior of the system and give rise to noise-induced transitions. The problems of modeling this phenomenon in the liquid helium counterflow system are discussed and a first model, providing a unified description of the experimental observations for weak and strong noise, is developed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01044710
Permalink