315 citations · 3.8k across the 115 of their papers we have counts for
7 papers · 1 filter
Exceptional Excitons
Enrico Perfetto, Gianluca Stefanucci
Non-Hermitian physics is reshaping our understanding of quantum systems by revealing states and phenomena without Hermitian counterparts. While non-Hermiticity is typically associa…
Non-Hermitian Bethe-Salpeter Equation for Open Systems: Emergence of Exceptional Points in Excitonic Spectra from First Principles
Zhenlin Zhang, Wei Hu, Enrico Perfetto +1
In open quantum systems hosting excitons, dissipation mechanisms critically shape the excitonic dynamics, band-structure and topological properties. A microscopic understanding of…
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…
A Unified Simulation Framework for Correlated Driven-Dissipative Quantum Dynamics
Thomas Blommel, Enrico Perfetto, Gianluca Stefanucci +1
Time-resolved photoemission spectroscopy provides a unique and direct way to explore the real-time nonequilibrium dynamics of electrons and holes. The formal theory of the spectral…
Long-Lived Coherence between Incoherent Excitons revealed by Time-Resolved ARPES: An Exact Solution
Zhenlin Zhang, Wei Hu, Enrico Perfetto +1
We investigate the exciton dynamics in an exactly solvable two-band model for semiconductors. The model incorporates light-matter, electron-electron and electron-phonon interaction…
The First Principles Equation for Coherent Phonons: Dynamics and Polaron distortions
Gianluca Stefanucci, Enrico Perfetto
This paper addresses the first principles description of coherent phonons in systems subjected to optical excitations and/or doping. We reformulate the first-principles Ehrenfest e…