Author

C. A. Perroni

2 papers indexed here

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Preprint Aug 2026

Ballistic-to-Localized Dynamics as Signature of Quantum Phase Transition in Josephson Junction

Using state-of-the-art numerical techniques, we investigate how quantum phase fluctuations and quasiparticle tunneling shape the behavior of a small-capacitance Josephson junction across Ohmic, sub-Ohmic, and super-Ohmic dissipation regimes. We show that increasing the Ohmic dissipation strength drives a Berezinskii-Ko...

F. G. Capone, A. de Candia, G. Di Bello et al. · 0 citations

Preprint Sep 2026

Dynamical Crossover of the Quantum Fisher Information in the Spin-Boson Model

We investigate the dynamical quantum Fisher information of a two-level system coupled to a bosonic environment, focusing on the estimation of the qubit gap. We combine analytical calculations with numerically controlled matrix-product-state simulations. In the exactly solvable pure-dephasing Ohmic regime at zero temper...

D. Parlato, G. Di Bello, F. Pavan et al. · 0 citations