Biphonons in the Klein-Gordon lattice
L. Proville
TL;DR
This paper introduces a numerical method to analyze biphonon excitations in Klein-Gordon lattices with non-quadratic atomic displacement energies, revealing detailed features and extending to multi-phonon states.
Contribution
It presents a novel numerical approach for studying quantum optical modes in Klein-Gordon lattices with non-quadratic energy contributions.
Findings
Detailed characterization of biphonon excitations.
Extension of results to multi-phonon bound states.
Insights into effects of non-quadratic terms on phonon dynamics.
Abstract
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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