Quantum signatures of breather-breather interactions
J. Dorignac, J. C. Eilbeck, M. Salerno, A. C. Scott
Abstract
The spectrum of the Quantum Discrete Nonlinear Schrödinger equation on a periodic 1D lattice shows some interesting detailed band structure which may be interpreted as the quantum signature of a two-breather interaction in the classical case. We show that this fine structure can be interpreted using degenerate perturbation theory.
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