448 citations · 2.9k across the 54 of their papers we have counts for
3 papers · 1 filter
Kane-Fisher weak link physics in the clean scratched-XY model
Gabriel Lemarié, Ilaria Maccari, Claudio Castellani
The nature of the superfluid-insulator transition in 1D has been much debated recently. In particular, to describe the strong disorder regime characterized by weak link proliferati…
Renormalization Group Approach to the Infrared Behavior of a Zero-Temperature Bose System
F. Pistolesi, C. Castellani, C. Di Castro +1
We exploit the renormalization-group approach to establish the {\em exact} infrared behavior of an interacting Bose system at zero temperature. The local-gauge symmetry in the brok…
Renormalization group analysis of the quantum non-linear sigma model with a damping term
Andrea Gamba, Marco Grilli, Claudio Castellani
We investigate the behavior of the zero-temperature quantum non-linear sigma model in d dimensions in the presence of a damping term of the form f(w)~ |w|^alpha, with 1 \le alpha <…