Biphonons in the Klein-Gordon lattice

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.

Comments and suggestions are welcome

References in corpus (3)

• Quantum signatures of breather-breather interactions
• Relaxation channels of two-vibron bound states in α-helix proteins
• Tunneling of quantum rotobreathers

Cited by in corpus (6)

• Hydrogen and vacancy clustering in zirconium
• Vibron-polaron in alpha-helices. II. Two-vibron bound states
• Quantum breathers in a nonlinear Klein Gordon lattice
• Boundary effects on quantum q-breathers in a Bose-Hubbard chain
• Fast energy transfer mediated by multi-quanta bound states in a nonlinear quantum lattice
• Dynamical structure factor of a nonlinear Klein-Gordon lattice