105 citations · 1.9k across the 97 of their papers we have counts for
16 papers · 1 filter
Many-Body Perturbation Theory for Driven Dissipative Quasiparticle Flows and Fluctuations
Thomas Blommel, Enrico Perfetto, Gianluca Stefanucci +1
We present a unified many-body perturbation theory for open quantum systems, that treats dissipation, correlations, and external driving on equal footing. Using a Keldysh-Lindblad…
Time-linear scaling NEGF methods for real-time simulations of interacting electrons and bosons. I. Formalism
Yaroslav Pavlyukh, Enrico Perfetto, Daniel Karlsson +2
Simulations of interacting electrons and bosons out of equilibrium, starting from first principles and aiming at realistic multiscale scenarios, is a grand theoretical challenge. H…
Fast Green's function method for ultrafast electron-boson dynamics
Daniel Karlsson, Robert van Leeuwen, Yaroslav Pavlyukh +2
The interaction of electrons with quantized phonons and photons underlies the ultrafast dynamics of systems ranging from molecules to solids, and it gives rise to a plethora of phy…
The Generalized Kadanoff-Baym Ansatz with Initial Correlations
Daniel Karlsson, Robert van Leeuwen, Enrico Perfetto +1
Within the non-equilibrium Green's function (NEGF) formalism, the Generalized Kadanoff-Baym Ansatz (GKBA) has stood out as a computationally cheap method to investigate the dynamic…
Dynamical formation and manipulation of Majorana fermions in driven quantum wires
E. Perfetto
Controlling the dynamics of Majorana fermions (MF) subject to time-varying driving fields is of fundamental importance for the practical realization of topological quantum computin…
Insight on Hole-Hole Interaction and Magnetic Order from Dichroic Auger-Photoelectron Coincidence Spectra
Michele Cini, Enrico Perfetto, Roberto Gotter +3
The absence of sharp structures in the core-valence-valence Auger line shapes of partially filled bands has severely limited the use of electron spectroscopy in magnetic crystals a…
On the ab initio calculation of CVV Auger spectra in closed-shell systems
G. Fratesi, M. I. Trioni, G. P. Brivio +3
We propose an ab initio method to evaluate the core-valence-valence (CVV) Auger spectrum of systems with filled valence bands. The method is based on the Cini-Sawatzky theory, and…
Auger transitions in one-dimensional metals
E. Perfetto
We present a dynamical theory of the Auger decay in one-dimensional (1D) metals described by the Tomonaga-Luttinger model. An analytic expression of the Auger current is derived in…
Electronic correlations in graphite and carbon nanotubes from Auger spectroscopy
E. Perfetto, M. Cini, S. Ugenti +5
We have determined the screened on-site Coulomb repulsion in graphite and single wall carbon nanotubes by measuring their Auger spectra and performing a new theoretical analysis ba…
Electronic instabilities of a Hubbard model approached as a large array of coupled chains: competition between d-wave superconductivity and pseudogap phase
E. Perfetto, J. Gonzalez
We study the electronic instabilities in a 2D Hubbard model where one of the dimensions has a finite width, so that it can be considered as a large array of coupled chains. The fin…
Modulation of Luttinger liquid exponents in multi-walled carbon nanotubes
S. Bellucci, J. Gonzalez, P. Onorato +1
We develop in this paper a theoretical framework that applies to the intermediate regime between the Coulomb blockade and the Luttinger liquid behavior in multi-walled carbon nanot…
Electronic instabilities in 3D arrays of small-diameter (3,3) carbon nanotubes
J. Gonzalez, E. Perfetto
We investigate the electronic instabilities of the small-diameter (3,3) carbon nanotubes by studying the low-energy perturbations of the normal Luttinger liquid regime. The bosoniz…
Coulomb screening and electronic instabilities of small-diameter (5,0) nanotubes
J. Gonzalez, E. Perfetto
We investigate the instabilities that may lead to the breakdown of the Luttinger liquid in the small-diameter (5,0) nanotubes, paying attention to the competition between the effec…
Pairing in Cu-O Models: Clues of Joint Electron-Phonon and Electron-Electron Interactions
Enrico Perfetto, Michele Cini
We discuss a many-electron Hamiltonian with Hubbard-like repulsive interaction and linear coupling to the phonon branches, having the Cu-O plane of the superconducting cuprates as…
Symmetric Hubbard Systems with Superconducting Magnetic Response
Agnese Callegari, Michele Cini, Enrico Perfetto +1
In purely repulsive, -symmetric Hubbard clusters a correlation effect produces an effective two-body attraction and pairing; the key ingredient is the availability of W=0 p…
On-Site Repulsion as the Source of Pairing in Carbon Nanotubes and Intercalated Graphite
Enrico Perfetto, Gianluca Stefanucci, Michele Cini
We show that different non-conventional superconductors have one fundamental feature in common: pair eigenstates of the Hamiltonian are repulsion-free, the W=0 pairs. In extended H…