2 papers
quant-ph2026
Improved convergence radius of the Fer expansion for Hermitian generators
Lorenzo Bagnasacco, Vittorio Giovannetti
The Dyson series expands the propagator of a time-dependent Hamiltonian in powers of the Hamiltonian, but its truncations are in general not unitary. The Fer expansion writes the s…
quant-ph2025
Formal Integration of Electron Scattering Processes via Separation of Dynamical and Geometric Contributions
Lorenzo Bagnasacco, Fabio Taddei, Vittorio Giovannetti
By decoupling the geometric from the dynamical contributions in the scattering processes, we develop a method to compute the scattering matrix of electrons in a one-dimensional coh…