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Publications Influence

Some Exact Properties of the Nonequilibrium Response Function for Transient Photoabsorption

- E. Perfetto, G. Stefanucci
- Physics
- 30 March 2015

The physical interpretation of time-resolved photoabsorption experiments is not as straightforward as for the more conventional photoabsorption experiments conducted on equilibrium systems. In fact,… Expand

25 2- PDF

Charge dynamics in molecular junctions: Nonequilibrium Green's function approach made fast

- S. Latini, E. Perfetto, A. Uimonen, R. Leeuwen, G. Stefanucci
- Physics
- 19 November 2013

Real-time Green's function simulations of molecular junctions (open quantum systems) are typically performed by solving the Kadanoff-Baym equations (KBE). The KBE, however, impose a serious… Expand

57 1- PDF

Time-dependent Landauer-Buttiker formula: application to transient dynamics in graphene nanoribbons

- R. Tuovinen, E. Perfetto, G. Stefanucci, R. Leeuwen
- Physics
- 20 December 2013

In this work we develop a time-dependent extension of the Landauer-Buttiker approach to study transient dynamics in time-dependent quantum transport through molecular junctions. A key fea- ture of… Expand

32 1- PDF

The Dissection Algorithm for the Second‐Born Self‐Energy

- E. Perfetto, G. Stefanucci
- Physics
- 8 October 2018

We describe an algorithm to efficiently compute the second-Born self-energy of many-body perurbation theory. The core idea consists in dissecting the set of all four-index Coulomb integrals into… Expand

4 1- PDF

Critical currents in graphene Josephson junctions

- J. Gonzalez, E. Perfetto
- Physics
- 27 February 2008

We study the superconducting correlations induced in graphene when it is placed between two superconductors, focusing in particular on the supercurrents supported by the 2D system. For this purpose… Expand

13 1- PDF

First-principles approach to excitons in time-resolved and angle-resolved photoemission spectra

- E. Perfetto, D. Sangalli, A. Marini, G. Stefanucci
- Physics
- 21 July 2016

In this work we put forward a first-principles approach and propose an accurate diagrammatic approximation to calculate the time-resolved (TR) and angle-resolved photoemission spectrum of systems… Expand

31- PDF

Time-dependent quantum transport with superconducting leads: A discrete-basis Kohn-Sham formulation and propagation scheme

- G. Stefanucci, E. Perfetto, M. Cini
- Physics
- 9 November 2009

In this work we put forward an exact one-particle framework to study nanoscale Josephson junctions out of equilibrium and propose a propagation scheme to calculate the time-dependent current in… Expand

45- PDF

First-principles nonequilibrium Green's-function approach to transient photoabsorption: Application to atoms

- E. Perfetto, A. Uimonen, R. Leeuwen, G. Stefanucci
- Physics
- 20 July 2015

We put forward a first-principle nonequilibrium Green’s-function (NEGF) approach to calculate the transient photoabsorption spectrum of optically thin systems. The method can deal with pump fields of… Expand

29- PDF

Suppression of electron?electron repulsion and superconductivity in ultra-small carbon nanotubes

- S. Bellucci, M. Cini, P. Onorato, E. Perfetto
- Physics
- 31 March 2006

Recently, ultra-small diameter single wall nanotubes with diameter of ~0.4 nm have been produced and many unusual properties were observed, such as superconductivity, leading to a transition… Expand

29- PDF

CHEERS: a tool for correlated hole-electron evolution from real-time simulations.

- E. Perfetto, G. Stefanucci
- Physics, Medicine
- Journal of physics. Condensed matter : an…
- 8 October 2018

We put forward a practical nonequilibrium Green's function (NEGF) scheme to perform real-time evolutions of many-body interacting systems driven out of equilibrium by external fields. CHEERS is a… Expand

17- PDF