27 citations · 60 across the 5 of their papers we have counts for
5 papers
Collective excitations of a strongly-correlated non-equilibrium photon fluid across the Mott/superfluid phase transition
Fabio Caleffi, Massimo Capone, Iacopo Carusotto
We develop a Gutzwiller theory for the non-equilibrium steady states of a strongly-interacting photon fluid driven by a non-Markovian incoherent pump. In particular, we explore the…
Quantum fluctuations beyond the Gutzwiller approximation in the Bose-Hubbard model
Fabio Caleffi
Taking inspiration from the state-of-the art knowledge of the Bose-Hubbard (BH) model and recent methodological developments in its fermionic counterpart, this work deals with the…
Lattice polarons across the superfluid to Mott insulator transition
V. E. Colussi, F. Caleffi, C. Menotti +1
We study the physics of a mobile impurity confined in a lattice, moving within a Bose-Hubbard bath at zero temperature. Within the Quantum Gutzwiller formalism, we develop a beyond…
Impurity dephasing in a Bose-Hubbard model
Fabio Caleffi, Massimo Capone, Inés de Vega +1
We study the dynamics of a two-level impurity embedded in a two-dimensional Bose-Hubbard model at zero temperature from an open quantum system perspective. Results for the decohere…
Quantum fluctuations beyond the Gutzwiller approximation in the Bose-Hubbard model
Fabio Caleffi, Massimo Capone, Chiara Menotti +2
We develop a quantum many-body theory of the Bose-Hubbard model based on the canonical quantization of the action derived from a Gutzwiller mean-field ansatz. Our theory is a syste…