Sökning: "Hartree-Fock"

Visar resultat 1 - 5 av 22 uppsatser innehållade ordet Hartree-Fock.

  1. 1. Error propagation in nuclear models

    Kandidat-uppsats, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Författare :Artis Mucenieks; [2023]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : In this thesis we perform error analysis of a nuclear model based on density-functional theory developed in Lund. The Lund model allows us to perform calculations of nuclear spectra more efficiently by constructing a simple effective Hamiltonian reproducing the quadrupole deformation and pairing interaction strength parameters of a spherical Hartree-Fock reference functional. LÄS MER

  3. 2. The Bloch-Messiah theorem and its application to overlaps

    Kandidat-uppsats, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Författare :Frieder Selisko; [2023]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : The Bogoliubov transformation is the starting point for the Hartree-Fock-Bogoliubov method and thus for many theoretical approaches that describe heavy nuclei. This transformation is based on two matrices, denoted by U and V, which are called Bogoliubov amplitudes. In this paper the properties of these matrices are investigated. LÄS MER

  4. 3. Green's Functions Investigations in Quantum Transport Geometries

    Master-uppsats, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Författare :Philip Johansson; [2022]
    Nyckelord :Quantum transport; Green s functions; self-energy; non-equilibrium; many-body physics; Physics and Astronomy;

    Sammanfattning : In this thesis we employ the non-equilibrium Green’s function (NEGF) method to study both finite and infinite systems. We develop a codebase capable of computing the steady state interacting NEGF in open systems, i.e. LÄS MER

  5. 4. Exploring the application of neural networks in predictions of nuclear binding energies

    Kandidat-uppsats, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Författare :Martin Waites; [2020]
    Nyckelord :neural networks; drip-line; nuclear physics; binding energy; exotic nuclei; Hartree-Fock-Bogolyubov; Physics and Astronomy;

    Sammanfattning : In this project the locations of the proton and neutron drip-lines are predicted using neural networks and theoretical data obtained by applying the HFBTHO program. For each of the neural networks a comparison is made between neural network predictions and experimental data in the region experimental data exists. LÄS MER

  7. 5. Symmetry restoration of HFB states using projection

    Uppsats för yrkesexamina på grundnivå, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Författare :Carl Frostenson; [2019]
    Nyckelord :Symmetry restoration; Projection; HFB; nuclear physics; nuclear; Physics and Astronomy;

    Sammanfattning : The restoration of particle number and angular momentum symmetry using projection operators has been theoretically investigated for mean-field Hartree-Fock-Bogoliubov (HFB) states. A computer code for the projection of particle number was then implemented. LÄS MER