Quantum breathers in a nonlinear Klein Gordon lattice

Details Quantum breathers in a nonlinear Klein Gordon lattice Quantum breathers in a nonlinear Klein Gordon lattice

2005-07-04

arxiv.org/abs/quant-ph/0507033v1

Physics

Quantum Physics

Scientific paper

10.1016/j.physd.2005.12.019

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.

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