3 papers
math-ph2026
A Zero-Range Model for the Efimov Effect in the Born-Oppenheimer Approximation
G. Basti, D. Ferretti, A. Teta
In this note we discuss the Efimov effect emerging in a three-particle quantum system with zero-range interactions. In particular, we consider two non-interacting identical bosons…
math-ph2025
Effective Dynamics for Weakly Interacting Bosons in an Iterated High-Density Thermodynamic Limit
Daniele Ferretti, Kalle Koskinen
We study the time evolution of weakly interacting Bose gases on a three-dimensional torus of arbitrary volume. The coupling constant is supposed to be inversely proportional to the…
math-ph2025
Hamiltonian for a Bose gas with Contact Interactions
Daniele Ferretti, Alessandro Teta
We study the Hamiltonian for a three-dimensional Bose gas of spinless particles interacting via zero-range (also known as contact) interactions. Such interactions are en…