Essays about: "bethe lattice"

Found 3 essays containing the words bethe lattice.

  1. 1. Density Functional Theory for the Hubbard-Holstein model

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

    Author : Pernilla Helmer; [2018]
    Keywords : density functional theory; hubbard; holstein; bethe lattice; cayley tree; dynamical mean field theory; exchange; correlation; exchange correlation potential; xc-potential; Hxc-potential; Physics and Astronomy;

    Abstract : The physics of interacting many-body systems is a very complex and challenging subject. Therefore one in general needs to use simplified models and approximate methods for studying these systems theoretically. READ MORE

  2. 2. Many-body-based DFT treatment of fermions in optical lattices

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

    Author : Jérémie Westergren; [2017]
    Keywords : DFT; density functional theory; MBA; many-body approximations; Hubbard model; Ultra cold atoms; cold atoms; optical lattice; Physics and Astronomy;

    Abstract : With recent advances in the field of ultra cold atoms one can, by trapping atoms at low temperatures by laser beams, simulate systems which can be adequately described by single-band lattice Hamiltonians. Also, due to the high parameter tunability of the experimental setups, lattice disorder can be introduced in a con- trolled fashion in these systems. READ MORE

  3. 3. Monte  Carlo simulation for the prediction of gamma-induced damage in metals  

    University essay from KTH/Reaktorfysik

    Author : Luca Messina; [2010]
    Keywords : ;

    Abstract : Nuclear waste management represents the main problem related to nuclear power generation. The Swedish project for an ultimate nuclear waste repos- itory  is in a very advanced state and cast iron-copper canisters have been designed with the aim of isolating the spent fuel from the environment for at least 105 years. READ MORE