Essays about: "Slater determinants"

Found 2 essays containing the words Slater determinants.

1. 1. Variational approach to the many-body problem with error estimation

   University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Author : Claes Rogius Svensson; [2018]
   Keywords : Many-body problems; Slater determinants; variational approach; Physics and Astronomy;

   Abstract : In this thesis a method for doing approximate calculations of the ground state of quantum mechanical many-body systems is developed and implemented. This method uses the Hartree-Fock method as a starting point and approximates the ground state as a linear combination of non-orthogonal Slater determinants. READ MORE

3. 2. Excited States in Variational Many-Body Approaches

   University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Author : David Gustafsson; [2018]
   Keywords : quantum mechanics; many-body problems; excited states; Hartree-Fock method; variational method; VAMPIR; Physics and Astronomy;

   Abstract : A method is implemented wherein numerical approximations to the ground and first few excited states of a quantum mechanical N -body 1D harmonic oscillator are found through variational methods, representing the states as a linear combination of normalized pseudo-states which are themselves linear combinations of non-orthogonal Slater determinants. These states are then used as a low energy basis for configuration interaction. READ MORE