28 citations · 94 across the 7 of their papers we have counts for
7 papers
Cumulant expansion in the Holstein model: Spectral functions and mobility
Petar Mitrić, Veljko Janković, Nenad Vukmirović +1
We examine the range of validity of the second-order cumulant expansion (CE) for the calculation of spectral functions, quasiparticle properties, and mobility of the Holstein polar…
Spectral Functions of the Holstein Polaron: Exact and Approximate Solutions
Petar Mitrić, Veljko Janković, Nenad Vukmirović +1
It is generally accepted that the dynamical mean field theory gives a good solution of the Holstein model, but only in dimensions greater than two. Here, we show that this theory,…
Spectral and thermodynamic properties of the Holstein polaron: Hierarchical equations of motion approach
Veljko Janković, Nenad Vukmirović
We develop a hierarchical equations of motion (HEOM) approach to compute real-time single-particle correlation functions and thermodynamic properties of the Holstein model at finit…
Nonequilibrium steady-state picture of incoherent light-induced excitation harvesting
Veljko Janković, Tomáš Mančal
We formulate a comprehensive theoretical description of excitation harvesting in molecular aggregates photoexcited by weak incoherent radiation. An efficient numerical scheme that…
Origin of space-separated charges in photoexcited organic heterojunctions on ultrafast time scales
Veljko Janković, Nenad Vukmirović
We present a detailed investigation of ultrafast (subpicosecond) exciton dynamics in the lattice model of a donor/acceptor heterojunction. Exciton generation by means of a photoexc…
Dynamics of exciton formation and relaxation in photoexcited semiconductors
Veljko Janković, Nenad Vukmirović
We investigate the dynamics of the exciton formation and relaxation on a picosecond time scale following a pulsed photoexcitation of a semiconductor. The study is conducted in the…
Non-equilibrium Optical Conductivity in Materials with Localized Electronic States
Veljko Janković, Nenad Vukmirović
A wide range of disordered materials contain electronic states that are spatially well localized. In this work, we investigated the electrical response of such systems in non-equil…