29 citations · 92 across the 5 of their papers we have counts for
6 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…
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…
Quantum transport in semiconductor quantum dot superlattices: electron-phonon resonances and polaron effects
Nenad Vukmirović, Zoran Ikonić, Dragan Indjin +1
Electron transport in periodic quantum dot arrays in the presence of interactions with phonons was investigated using the formalism of nonequilibrium Green's functions. The self-co…
Symmetry of Hamiltonian in pyramidal InAs/GaAs quantum dots: Application to the calculation of electronic structure
Nenad Vukmirović, Dragan Indjin, Vladimir D. Jovanović +2
A method for the calculation of the electronic structure of pyramidal self-assembled InAs/GaAs quantum dots is presented. The method is based on exploiting the exact …