Electronic structure Molecular structure 3 Solid state physics 3 Density functionals 2 Mathematical models 2 Atomic absorbtion spectroscopy 1 Atomic structure 1 Chemical bonds 1 Diffraction 1 Electron 1 Electron-phonon interaction 1 Electrons 1 Emission spectroscopy 1 Many-body problem 1 Materials 1 Mathematics 1 Molecular dynamics 1 Monte Carlo method 1 Neutron 1 Perturbation (Quantum dynamics) 1 Quantum chemistry 1 Quantum theory 1 Quantum wells 1 Solid state chemistry 1 Superlattices as materials 1 Symmetry(Physics) 1 Testing 1