Quantum signatures of breather-breather interactions

Jerome Dorignac, J. C. Eilbeck, M. Salerno, Alwyn C. Scott

Research output: Contribution to journalArticlepeer-review

47 Citations (SciVal)


The spectrum of the quantum discrete nonlinear Schrödinger equation, or boson Hubbard Hamiltonian, 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. This fine structure is studied using degenerate perturbation theory. We also present a modification to this model, which increases the mobility of bound states.
Original languageEnglish
Article number025504
JournalPhysical Review Letters
Issue number2
Publication statusPublished - 9 Jul 2004


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