L\'evy processes and Jacobi fields

We review the recent results on the Jacobi field of a (real-valued) L'evy process defined on a Riemannian manifold. In the case where the L'evy process is neither Gaussian, nor Poisson, the corresponding Jacobi field acts in an extended Fock space. We also give a unitary equivalent representation of the Jacobi field in a usual Fock space. This representation is inspired by a result by Accardi, Franz, and Skeide (2002).