Existence and stability of bushes of vibrational modes for octahedral mechanical systems with Lennard-Jones potential

Details Existence and stability of bushes of vibrational modes for octahedral mechanical systems with Lennard-Jones potential Existence and stability of bushes of vibrational modes for octahedral mechanical systems with Lennard-Jones potential

2001-12-12

arxiv.org/abs/cond-mat/0112213v1

Physics

Condensed Matter

LaTeX, 25 pages, 1 figure, submitted to International Journal of Non-Linear Mechanics

Scientific paper

The special nonlinear dynamical regimes, "bushes of normal modes", can exist in the N-particle Hamiltonian systems with discrete symmetry. The dimension of the bush can be essentially less than that of the whole mechanical system. One-dimensional bushes represent the similar nonlinear normal modes introduced by Rosenberg. A given bush can be excited by imposing the appropriate initial conditions, and the energy of the initial excitation turns out to be trapped in this bush. In the present paper, we consider all possible vibrational bushes in the simple octahedral mechanical system and discuss their stability under assumption that the interactions between particles are described by the Lennard-Jones potential.

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