Stability of quantum breathers
arXiv:cond-mat/0601209 · doi:10.1103/PhysRevLett.96.065501
Abstract
Using two methods we show that a quantized discrete breather in a 1-D lattice is stable. One method uses path integrals and compares correlations for a (linear) local mode with those of the quantum breather. The other takes a local mode as the zeroth order system relative to which numerical, cutoff-insensitive diagonalization of the Hamiltonian is performed.
4 pages, 3 figures