Title: Spectral and scattering theory for perturbed block Toeplitz operators,
Abstract: We analyse spectral properties of a class of compact perturbations of block
Toeplitz operators associated with analytic symbols. In particular, a limiting
absorption principle and the absence of singular continuous spectrum are shown.
The existence and the completeness of wave operators are also obtained. Our
study is based on the construction of a conjugate operator in Mourre sense for
the corresponding Laurent operators.