74 citations · 714 across the 29 of their papers we have counts for
30 papers
Cheers: a linear-scaling KBE+GKBA code
Y. Pavlyukh, R. Tuovinen, E. Perfetto +1
The interaction of electrons with quantized phonons and photons underlies the ultrafast dynamics of systems ranging from molecules to solids, giving rise to a plethora of physical…
Time-linear quantum transport simulations with correlated nonequilibrium Green's functions
R. Tuovinen, Y. Pavlyukh, E. Perfetto +1
We present a time-linear scaling method to simulate open and correlated quantum systems out of equilibrium. The method inherits from many-body perturbation theory the possibility t…
Interacting electrons and bosons in the doubly screened approximation: A time-linear scaling method for first-principles simulations
Yaroslav Pavlyukh, Enrico Perfetto, Gianluca Stefanucci
We augment the time-linear formulation of the Kadanoff-Baym equations for systems of interacting electrons and quantized phonons or photons with the approximation,…
Time-linear scaling NEGF methods for real-time simulations of interacting electrons and bosons. II. Dynamics of polarons and doublons
Yaroslav Pavlyukh, Enrico Perfetto, Daniel Karlsson +2
Nonequilibrium dynamics of the open chain Holstein-Hubbard model is studied using the linear time-scaling GKBA+ODE scheme developed in the preceeding paper. We focus on the set of…
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…
Real-time GW: Toward an ab initio description of the ultrafast carrier and exciton dynamics in two-dimensional materials
E. Perfetto, Y. Pavlyukh, G. Stefanucci
We demonstrate the feasibility of the time-linear scaling formulation of the method [Phys. Rev. Lett. {\bf 124}, 076601 (2020)] for {\it ab initio} simulations of optically dr…
Photoinduced dynamics of organic molecules using nonequilibrium Green's functions with second-Born, , -matrix and three-particle ladder correlations
Yaroslav Pavlyukh, Enrico Perfetto, Gianluca Stefanucci
The ultrafast hole dynamics triggered by the photoexcitation of molecular targets is a highly correlated process even for those systems, like organic molecules, having a weakly cor…
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…
Dynamically screened vertex correction to
Y. Pavlyukh, G. Stefanucci, R. van Leeuwen
Diagrammatic perturbation theory is a powerful tool for the investigation of interacting many-body systems, the self-energy operator encoding all the variety of scattering proc…
Ultrafast coupled charge and spin dynamics in strongly correlated NiO
Konrad Gillmeister, Denis Golež, Cheng-Tien Chiang +5
Charge excitations across an electronic band gap play an important role in opto-electronics and light harvesting. In contrast to conventional semiconductors, studies of above-band-…
A functional approach to the electronic and bosonic dynamics of many-body systems perturbed with an arbitrary strong electron-boson interaction
Andrea Marini, Yaroslav Pavlyukh
We present a formal derivation of the many-body perturbation theory for a system of electrons and bosons subject to a nonlinear electron-boson coupling. The interaction is treated…
Spectral properties from Matsubara Green's function approach - application to molecules
Michael Schüler, Yaroslav Pavlyukh
We present results for many-body perturbation theory for the one-body Green's function at finite temperatures using the Matsubara formalism. Our method relies on the accurate repre…
Vertex corrections for positive-definite spectral functions of simple metals
Y. Pavlyukh, A. -M. Uimonen, G. Stefanucci +1
We present a systematic study of vertex corrections in the homogeneous electron gas at metallic densities. The vertex diagrams are built using a recently proposed positive-definite…
Variance component score test for time-course gene set analysis of longitudinal RNA-seq data
Denis Agniel, Boris P Hejblum
As gene expression measurement technology is shifting from microarrays to sequencing, the statistical tools available for their analysis must be adapted since RNA-seq data are meas…
Single and double photoemission and generalizations
Yaroslav Pavlyukh
A unified diagrammatic treatment single and double electron photoemission currents is presented. The irreducible lesser density-density response function is the starting point of t…
Taming singularities of the diagrammatic many-body perturbation theory
Yaroslav Pavlyukh, Jamal Berakdar, Angel Rubio
In a typical scenario the diagrammatic many-body perturbation theory generates asymptotic series. Despite non-convergence, the asymptotic expansions are useful when truncated to a…
Optical vortex driven charge current loop and optomagnetism in fullerenes
Jonas Wätzel, Yaroslav Pavlyukh, Alexander Schäffer +1
Endohedral molecular magnets, e.g. as realized in fullerenes containing , are promising candidates for molecular electronics and quantum information processing. For…
Time-dependent many-body treatment of electron-boson dynamics: application to plasmon-accompanied photoemission
Michael Schüler, Jamal Berakdar, Yaroslav Pavlyukh
Recent experiments access the time-resolved photoelectron signal originating from plasmon satellites in correlated materials and address their build-up and decay in real time. Moti…
Disentangling multipole contributions to collective excitations in fullerenes
Michael Schüler, Jamal Berakdar, Yaroslav Pavlyukh
Angular resolved electron energy-loss spectroscopy (EELS) gives access to the momentum and the energy dispersion of electronic excitations and allows to explore the transition from…
Accessing electronic correlations by half-cycle pulses and time-resolved spectroscopy
Y. Pavlyukh, J. Berakdar
Ultrashort non-resonant electromagnetic pulses applied to effective one-electron systems may operate on the electronic state as a position or momentum translation operator. As deri…
Single and double electron emission: combination of projection operator and nonequilibrium Green's function approaches
Y. Pavlyukh, M. Schüler, J. Berakdar
This work provides a unified theoretical treatment of the single and correlated double-electron emission from a general electronic system. Using Feshbach projection method, the sta…
Diagrammatic expansion for positive density-response spectra: Application to the electron gas
A. -M. Uimonen, G. Stefanucci, Y. Pavlyukh +1
In a recent paper [Phys. Rev. B 90, 115134 (2014)] we put forward a diagrammatic expansion for the self-energy which guarantees the positivity of the spectral function. In this wor…
Diagrammatic expansion for positive spectral functions beyond GW: Application to vertex corrections in the electron gas
G. Stefanucci, Y. Pavlyukh, A. -M. Uimonen +1
We present a diagrammatic approach to construct self-energy approximations within many-body perturbation theory with positive spectral properties. The method cures the problem of n…
Local Ionization Dynamics Traced by Photoassisted Scanning Tunneling Microscopy: A Theoretical Approach
M. Schueler, Y. Pavlyukh, J. Berakdar
For tracing the spatiotemporal evolution of electronic systems, we suggest and analyze theoretically a setup that exploits the excellent spatial resolution based on scanning tunnel…