Jozsef Lorinczi Qualitative properties of the ground state in Nelson's massless scalar field model -- A Gibbs measure-based approach (162K, postscript) ABSTRACT. This is a summary of results based upon [2,4,5,3] outlining how Gibbs measures can be associated with Nelson's massless scalar field model in its Euclidean representation. These Gibbs measures will be used for deriving qualitative properties of the Fock space ground state.