Determining the first order perturbation of a polyharmonic operator on admissible manifolds

Abstract

We consider the inverse boundary value problem for the first order perturbation of the polyharmonic operator ${\mathcal{L}}_{g,X,q}$, with $X$ being a $W^{1,\infty }$ vector field and $q$ being an $L^{\infty }$ function on compact Riemannian manifolds with boundary which are conformally embedded in a product of the Euclidean line and a simple manifold. We show that the knowledge of the Dirichlet-to-Neumann determines $X$ and $q$ uniquely. The method is based on the construction of complex geometrical optics solutions using the Carleman estimate for the Laplace-Beltrami operator due to Dos Santos Ferreira, Kenig, Salo and Uhlmann. Notice that the corresponding uniqueness result does not hold for the first order perturbation of the Laplace-Beltrami operator.

23 pages