Jindrich Kolorenc, PhD.
Department of Condensed Matter TheoryInstitute of Physics, Academy of Sciences of the Czech Republic
Na Slovance 2, CZ-182 21 Prague, Czech Republic
office: 437, UTIA building (map/street view)
phone: +420-2-6605-2771
e-mail: < kolorenc (at) fzu (dot) cz >
Research interests
- quantum Monte Carlo (QMC) methods for electronic structure calculations
- review article on applications of QMC methods in solids: J.K. & L. Mitas, Rep. Prog. Phys. 74, 026502 (2011)
- properties of deep Earth materials under extreme conditions
- model description of cold atomic systems, BCS–BEC crossover
- contributions to the quantum Monte Carlo code QWalk (browse repository)
- several simple simulations I did some time ago to get started with the method
- advanced mean-field approaches
- asymptotic limit to high spatial dimensions for lattice fermions
- dynamical mean-field theory (DMFT) and beyond
- applications of the LDA+DMFT concepts to materials with strongly correlated d and f electrons
- transport in disordered systems
- diagrammatic approximations for two-particle vertex functions
- evolution of electronic states from weak to Anderson localization
The following examples show a few details, more can be found in the papers linked in the publication list.
Structural phase transition in crystalline FeO under pressure
![[figure: FeO phase diagram]](images/pV_B1_iB8_DMC_3_mod.png)
Pressure–volume equation of state of crystalline iron oxide calculated using diffusion quantum Monte Carlo method (lines), Phys. Rev. Lett. 101, 185502 (2008). (In collaboration with Lubos Mitas, NCSU.)
Legend: rock salt (B1) structure stable at low pressures (red line), NiAs (iB8) structure stable at high pressures (blue line), B1 experimental data (circles), iB8 experimental data (squares). Diffusion Monte Carlo predicts the transition pressure Pc at approximately 65 GPa, providing substantial improvement compared to DFT based approaches.
Mean-field phase diagram for non-interacting disordered electrons
![[figure: disorder phase diagram]](images/mobedg_born_color.png)
Phase diagram for an impure crystal calculated from our proposal of a mean field theory for disordered electronic systems, Phys. Rev. B 71, 033103 (2005), ibid. 245106 (2005). (In collaboration with Vaclav Janis, FZU AV CR.)
Legend: energy of quantum state (x-axis), measure of disorder strength (y-axis), band edge (black line), mobility edge (red line), localized/non-diffusive states (hatched area), extended/transport states (white “egg”)
Teaching
Exercises that accompany undergraduate course of Thermodynamics and Statistical Physics (Faculty of Mathematics and Physics, Charles University, Prague) – somewhat outdated (I was doing this in years 2002–2005), but might not be completely useless if you understand Czech.