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math-ph2022★ 4 cited
Quadratic forms for Aharonov-Bohm Hamiltonians
Davide Fermi
We consider a charged quantum particle immersed in an axial magnetic field, comprising a local Aharonov-Bohm singularity and a regular perturbation. Quadratic form techniques are u…
math-ph2022
Periodic striped states in Ising models with dipolar interactions
Davide Fermi, Alessandro Giuliani
We review the problem of determining the ground states of 2D Ising models with nearest neighbor ferromagnetic and dipolar interactions, and prove a new result supporting the conjec…