Hopf bifurcations with fluctuating gain

Details Hopf bifurcations with fluctuating gain Hopf bifurcations with fluctuating gain

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008an....329..701t&link_type=abstract

Astronomische Nachrichten, Vol.329, Issue 7, p.701

Astronomy and Astrophysics

Astronomy

Accretion Disks, Instabilities, Magnetohydrodynamics (Mhd), Turbulence

Scientific paper

A Hopf bifurcation describes a transition from a steady state to an oscillatory one. This report describes how the presence of white Gaussian noise in the term driving the instability (the gain) affects the character of such a transition. We find that for small noise intensities the effective critical value of the bifurcation parameter increases linearly with the noise intensity. This result is used to quantitatively describe the onset of the magneto-rotational instability in a laboratory experiment using liquid metal with turbulent background flow.

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