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math-ph2026
Vacuum and thermal fluctuations of a scalar field with point interactions
Davide Fermi, Marco Gurgoglione
We investigate the vacuum and thermal fluctuations of a neutral massless scalar field living in Minkowski spacetime and interacting with a finite number of point-like obstacles, mo…
math-ph2026
Homogenization of point interactions
Domenico Cafiero, Michele Correggi, Davide Fermi
We consider a non-relativistic quantum particle in , or , interacting with singular zero-range potentials concentrated on a large collection of points. W…