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Title: Confinement of discrete breathers in inhomogeneously profiled nonlinear chains
Author: Bena, Ioana
Saxena, A. (Avadh)
Tsironis, G. P.
Ibañes Miguez, Marta
Sancho, José M.
Keywords: Física estadística
Sistemes dinàmics diferenciables
Dinàmica reticular
Statistical physics
Differentiable dynamical systems
Lattice dynamics
Issue Date: 2003
Publisher: The American Physical Society
Abstract: We investigate numerically the scattering of a moving discrete breather on a pair of junctions in a Fermi-Pasta-Ulam chain. These junctions delimit an extended region with different masses of the particles. We consider (i) a rectangular trap, (ii) a wedge shaped trap, and (iii) a smoothly varying convex or concave mass profile. All three cases lead to DB confinement, with the ease of trapping depending on the profile of the trap. We also study the collision and trapping of two DBs within the profile as a function of trap width, shape, and approach time at the two junctions. The latter controls whether one or both DBs are trapped.
Note: Reproducció del document publicat a:
It is part of: Physical Review E, 2003, vol. 67, núm. 3p. 037601(1)-037601(4)
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ISSN: 1539-3755
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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