16 citations · 78 across the 13 of their papers we have counts for
7 papers · 1 filter
Liouvillian gap and out-of-equilibrium dynamics of a sunburst Kitaev ring: from local to uniform dissipation
Alessio Franchi, Francesco Tarantelli
We consider an open quantum system composed of a -dimensional Kitaev ring coupled with the environment via particle-loss dissipators in a \textit{sunburst} geometry. We…
Quantum critical behaviors and decoherence of weakly coupled quantum Ising models within an isolated global system
Alessio Franchi, Andrea Pelissetto, Ettore Vicari
We discuss the quantum dynamics of an isolated composite system consisting of weakly interacting many-body subsystems. We focus on one of the subsystems, S, and study the dependenc…
Decoherence and energy flow in the sunburst quantum Ising model
Alessio Franchi, Davide Rossini, Ettore Vicari
We study the post-quench unitary dynamics of a quantum sunburst spin model, composed of a transverse-field quantum Ising ring which is suddenly coupled to a set of independent exte…
Quantum many-body spin rings coupled to ancillary spins: The sunburst quantum Ising model
Alessio Franchi, Davide Rossini, Ettore Vicari
We study the ground-state properties of a quantum "sunburst model", composed of a quantum Ising spin-ring in a transverse field, symmetrically coupled to a set of ancillary isolate…
Critical crossover phenomena driven by symmetry-breaking defects at quantum transitions
Alessio Franchi, Davide Rossini, Ettore Vicari
We study the effects of symmetry-breaking defects at continuous quantum transitions (CQTs), which may arise from localized external fields coupled to the order-parameter operator.…
Phase diagram and Higgs phases of 3D lattice SU(Nc) gauge theories with multiparameter scalar potentials
Claudio Bonati, Alessio Franchi, Andrea Pelissetto +1
We consider three-dimensional lattice SU(Nc) gauge theories with degenerate multicomponent (Nf>1) complex scalar fields that transform under the fundamental representation of the g…