Quantum breathers in a nonlinear Klein Gordon lattice
arXiv:quant-ph/0507033 · doi:10.1016/j.physd.2005.12.019
Abstract
The quantum modes of a nonlinear Klein Gordon lattice have been computed numerically [L. Proville, Phys. Rev. B, vol. 71, 104306 (2005)]. The on-site nonlinearity has been found to lead to a phonon pairing and consequently some phonon bound states. In the present paper, the time dependent Wannier transform of these states is shown to exhibit a breather-like behavior, i.e., it is spatially localized and time-periodic. The typical time the lattice may sustain such breather states is studied as a function of the trapped energy and the intersite lattice coupling.
References in corpus (7)
- Localization and Equipartition of Energy in the beta-FPU Chain : Chaotic Breathers
- Quantum Lattice Solitons
- Quantum Breathers in a Nonlinear Lattice
- Biphonons in the Klein-Gordon lattice
- Nonintegrable Schrodinger Discrete Breathers
- Tunneling of quantum rotobreathers
- Dynamical structure factor of a nonlinear Klein-Gordon lattice