Prof. RNDr. Václav Jani¹, DrSc.
Head of Condensed Matter Theory Department
Institute of Physics
Academy of Sciences of the Czech Republic
Na Slovance 2, CZ  182 21 Prague
Czech Republic
and
Professor of Theoretical Physics
at
Charles University
Office: C440b, UTIABuilding
Phone: +420 26605 2153
Email: janis@fzu.cz
Vita
Research
Publications
 
Research interests:
Theory of strongly correlated electrons
Model description of electron correlations, Hubbard and Anderson impurity models, collective and cooperative phenomena, transition from weak to strong coupling regimes, breakdown of Fermiliquid phase, (dynamical) meanfield theory for intermediate and strong coupling, Kondo and insulating regimes; implementation of electron correlations in realistic calculational schemes
Quantum coherence and quantum phase transitions in itinerant systems
Quantitative description of quantum criticality, interactiondriven quantum phase transitions in metals, effects of noncommutativity of relevant operators on critical behavior, formation of bound and resonant pair states, structure of order parameters of quantum phases, transverse magnetic order, superconductivity
Transport properties of disordered electron systems
Vertex corrections in the electrical conductivity in impure metals, quantum diffusion and coherence, diagrammatic theory of weak and strong electron localization, metalinsulator transition
Theory of spin glasses and other random systems
Meanfield theory based on real replicas in the thermodynamic approach of Thouless, Anderson and Palmer for Ising and Heisenberg spin glasses and related models
Fieldtheoretic and diagrammatic methods for quantum twoparticle functions
Feynman diagrams and manybody Green functions for nonrelativistic quantum interacting systems, advanced approximations for twoparticle Green functions, vertex corrections, parquet approach to twoparticle vertex functions
Nonequilibrium phenomena
Quantum nonequilibrium systems, nonequilibrium Green functions and transport equations, xray edge problem and orthogonality catastrophe, twolevel systems in a phonon bath
University courses:
( Faculty of Mathematics and Physics of Charles University)
Thermodynamics and Statistical Physics I (course in Czech)
Thermodynamics and Statistical Physics II (course in Czech)
Statistical physics of quantum manyparticle systems I (hand written notes)
Statistical physics of quantum manyparticle systems II (hand written notes)
Renormalization theory of phase transitions
Study opportunities
Diploma theses
PhD theses
Research opportunities
Postdoc positions
Selected recent publications
V. Janiš and V. Pokorný, Vertices for correlated electron systems with anomalous propagators, ScienceJet 3:66 (2014) 110.
V. Janiš and V. Pokorný, Critical metalinsulator transition and divergence in a twoparticle vertex in disordered and interacting electron systems, Phys. Rev. B 90, 045143 (2014) 111.
V. Pokorný and V. Janiš,Vertex corrections to the meanfield electrical conductivity in disordered electron systems,
J. Phys.: Condens. Matter 25 175502 (2013) 110.
V. Janiš, A. Kauch, and A. Klíè, Free energy of meanfield spinglass models: Evolution operator and perturbation expansion, Phys. Rev. B 87, 054201 (2013) 111.
V. Janiš and A. Kllíè, Meanfield solution of the Potts glass near the transition temperature to the ordered phase, Phys. Rev. B 84, 064446 (2011) 110.
V. Janiš and V. Pokorný, Renormalized perturbation theories of Anderson localization: Selfconsistent twoparticle vertices, Ann. Phys. (Berlin) 523 (2011) 71523.
P. Augustinský and V. Janiš, Multiorbital simplified parquet equations for strongly correlated electrons, Phys. Rev. B 83, 035114 (2011)1  13.
V. Janiš and V. Pokorný, Vertex corrections to the electrical conductivity in models with elastically scattered electrons, Phys. Rev. B 81, 165103 (2010) 19.
