title: Stability of quantum breathers.
abstract: Using two methods we show that a quantized discrete breather in a 1D 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.
authors.affiliation: Physics Department, Clarkson University, Potsdam, New York 13699-5820, USA. schulman@clarkson.edu
authors.forename: L S
authors.initials: LS
authors.lastname: Schulman
authors.forename: D
authors.initials: D
authors.lastname: Tolkunov
authors.forename: E
authors.initials: E
authors.lastname: Mihokova