Biphonons in the Klein-Gordon lattice

Details Biphonons in the Klein-Gordon lattice Biphonons in the Klein-Gordon lattice

2004-03-19

arxiv.org/abs/cond-mat/0403516v6

Physics

Condensed Matter

Materials Science

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Scientific paper

10.1103/PhysRevB.71.104306

A numerical approach is proposed for studying the quantum optical modes in
the Klein-Gordon lattices where the energy contribution of the atomic
displacements is non-quadratic. The features of the biphonon excitations are
investigated in detail for different non-quadratic contributions to the
Hamiltonian. The results are extended to multi-phonon bound states.

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