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Duffing map

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Discrete-time dynamical system

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Plot of the Duffing map showing chaotic behavior, wherea = 2.75 andb = 0.15.

Phase portrait of a two-well Duffing oscillator (a differential equation, rather than a map) showing chaotic behavior.

TheDuffing map (also called as 'Holmes map') is adiscrete-time dynamical system. It is an example of a dynamical system that exhibitschaotic behavior. The Duffingmap takes a point (x_n, y_n) in theplane and maps it to a new point given by

x_{n+1}=y_{n}

y_{n+1}=-bx_{n}+ay_{n}-y_{n}^{3}.

The map depends on the twoconstantsa andb. These are usually set toa = 2.75 andb = 0.2 to produce chaotic behaviour. It is a discrete version of theDuffing equation.

External links

[edit]

Duffing oscillator on Scholarpedia

Chaos theory

Concepts

Core	Attractor Bifurcation Fractal Limit set Lyapunov exponent Orbit Periodic point Phase space
Anosov diffeomorphism Arnold tongue axiom A dynamical system Bifurcation diagram Box-counting dimension Correlation dimension Conservative system Ergodicity False nearest neighbors Hausdorff dimension Invariant measure Lyapunov stability Measure-preserving dynamical system Mixing Poincaré section Recurrence plot SRB measure Stable manifold Topological conjugacy
Theorems	Ergodic theorem Liouville's theorem Krylov–Bogolyubov theorem Poincaré–Bendixson theorem Poincaré recurrence theorem Stable manifold theorem Takens's theorem

Theoretical
branches

Chaotic
maps (list)

Discrete	Arnold's cat map Baker's map Complex quadratic map Coupled map lattice Duffing map Dyadic transformation Dynamical billiards outer Exponential map Gauss map Gingerbreadman map Hénon map Horseshoe map Ikeda map Interval exchange map Irrational rotation Kaplan–Yorke map Langton's ant Logistic map Standard map Tent map Tinkerbell map Zaslavskii map
Continuous	Double scroll attractor Duffing equation Lorenz system Lotka–Volterra equations Mackey–Glass equations Rabinovich–Fabrikant equations Rössler attractor Three-body problem Van der Pol oscillator

Physical
systems

Chaos
theorists

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