Change of basis Configuration interactions 4 Electrospinning 4 Expectation values 4 Magnetic moments 4 Molecular orbitals 4 Natural orbitals 4 Quantitative evaluation 4 Rapid convergence 4 Slater determinants 4 Unitary transformations 4 Wave functions 4 Bloch state 2 Bose Hubbard model 2 Bose-Einstein condensates 2 Bose-Hubbard Hamiltonian 2 Crystal lattices 2 Filling 2 Filling factor 2 Hamiltonians 2 Hopping rate 2 Hubbard model 2 Ionic conduction 2 Lattice sites 2 Level crossing 2 Localized wave functions 2 Optical materials 2 Quantum tunneling 2 Ring-shaped optical lattices 2 Statistical mechanics 2