24 citations · 104 across the 21 of their papers we have counts for
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Relative partition function of Coulomb plus delta interaction
Sergio Albeverio, Claudio Cacciapuoti, Mauro Spreafico
The relative partition function and the relative zeta function of the perturbation of the Laplace operator by a Coulomb potential plus a point interaction centered in the origin is…
Singular perturbations with boundary conditions and the Casimir effect in the half space
S. Albeverio, G. Cognola, M. Spreafico +1
We study the self adjoint extensions of a class of non maximal multiplication operators with boundary conditions. We show that these extensions correspond to singular rank one pert…
Zeta function regularization for a scalar field in a compact domain
G. Ortenzi, M. Spreafico
We express the zeta function associated to the Laplacian operator on in terms of the zeta function associated to the Laplacian on , where is a compact connec…
On the non homogeneous quadratic Bessel zeta function
Mauro Spreafico
We study the non homogeneous quadratic Bessel zeta function defined as the sum of the square of the positive zeros of the Bessel function plus a positive c…