Invariant manifolds of interior multi-spike states for the Cahn-Hilliard equation in higher space dimensions

Bates, Peter; Fusco, Giorgio; Jin, Jiayin

doi:10.1090/tran/6817

Invariant manifolds of interior multi-spike states for the Cahn-Hilliard equation in higher space dimensions
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by Peter W. Bates, Giorgio Fusco and Jiayin Jin PDF

Trans. Amer. Math. Soc. 369 (2017), 3937-3975 Request permission

Abstract:

We construct invariant manifolds of interior multi-spike states for the nonlinear Cahn-Hilliard equation and then investigate the dynamics on it. An equation for the motion of the spikes is derived. It turns out that the dynamics of interior spikes has a global character and each spike interacts with all the others and with the boundary. Moreover, we show that the speed of the interior spikes is super slow, which indicates the long time existence of dynamical multi-spike solutions in both positive and negative time. This result is the application of an abstract result concerning the existence of truly invariant manifolds with boundary when one has only approximately invariant manifolds. The abstract result is an extension of one by P. Bates, K. Lu, and C. Zeng to the case of a manifold with boundary, consisting of almost stationary states.

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