Abderemane MORAME
Absence of singular spectrum for a perturbation
of a two-dimensional Laplace-Beltrami operator
with periodic electro-magnetic potential
(40K, LATeX 2e)
ABSTRACT. We consider a metric g, a real one-form A
and a real function V, all periodic for
some lattice in dimension two of the real space.
We prove that the covariant Laplace-Beltrami
operator, associated to g and A and perturbed by V,
has continuous spectrum