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Updated: Jun 18, 2026

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Swift-Hohenberg equation with broken reflection symmetry
J Burke1, S M Houghton, E Knobloch
1Center for BioDynamics, Boston University, Boston, Massachusetts 02215, USA. jb@math.bu.edu
Abstract:
The bistable Swift-Hohenberg equation possesses a variety of time-independent spatially localized solutions organized in the so-called snakes-and-ladders structure. This structure is a consequence of a phenomenon known as homoclinic snaking, and is in turn a consequence of spatial reversibility of the equation. We examine here the consequences of breaking spatial reversibility on the snakes-and-ladders structure. We find that the localized states now drift, and show that the snakes-and-ladders structure breaks up into a stack of isolas. We explore the evolution of this new structure with increasing reversibility breaking and study the dynamics of the system outside of the snaking region using a combination of numerical and analytical techniques.
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