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- Título:
- Energy localization in the Phi(4) oscillator chain
- Univ Milan
- Universidade Estadual Paulista (UNESP)
- Universidade Federal de São Carlos (UFSCar)
- 1539-3755
- We study energy localization in a finite one-dimensional Phi(4) oscillator chain with initial energy in a single oscillator of the chain. We numerically calculate the effective number of degrees of freedom sharing the energy on the lattice as a function of time. We find that for energies smaller than a critical value, energy equipartition among the oscillators is reached in a relatively short time. on the other hand, above the critical energy, a decreasing number of particles sharing the energy is observed. We give an estimate of the effective number of degrees of freedom as a function of the energy. Our results suggest that localization is due to the appearance, above threshold, of a breather-like structure. Analytic arguments are given, based on the averaging theory and the analysis of a discrete nonlinear Schrodinger equation approximating the dynamics, to support and explain the numerical results.
- 1-Mai-2006
- Physical Review E. College Pk: American Physical Soc, v. 73, n. 5, 7 p., 2006.
- 7
- American Physical Soc
- http://dx.doi.org/10.1103/PhysRevE.73.056609
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- http://repositorio.unesp.br/handle/11449/34030
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