Unitary transformations Change of basis 4 Configuration interactions 4 Dissipative energy 4 Dynamical behaviours 4 Electrospinning 4 Energy dissipation 4 Exciton transport 4 Expectation values 4 Incoherent process 4 Local environments 4 Magnetic moments 4 Molecular orbitals 4 Natural orbitals 4 Open quantum systems 4 Polarons 4 Quantitative evaluation 4 Quantum electronics 4 Quantum optics 4 Rapid convergence 4 Slater determinants 4 Systems analysis 4 Variational methods 4 Wave functions 4