Sökning: "degenerate ground state"
Hittade 3 uppsatser innehållade orden degenerate ground state.
1. Spontaneous symmetry breaking for dipolar Bose-Einstein condensates in multiwell potentials
Kandidat-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologiSammanfattning : In this work, dipolar Bose-Einstein condensates in multiwell potentialsplaced to form dierent geometrical structures are studied theoretically inorder to determine how the ground state population of the particles in thepotential wells changes depending on the relative strength of the particlesdipole moment. In the analytical limit (neglecting intersite tunneling), asymmetry-breaking change in the number of wells that are populated byparticles is observed for all studied systems for a certain value of the rela-tive strength of the particles dipole moment. LÄS MER
2. Analysis of a spin-particle tunnelling junction
Kandidat-uppsats, Uppsala universitet/MaterialteoriSammanfattning : This project is to analyse the energy spectrum of a spin-molecular tunnelling junction which is composed of molecules confined between two conducting metallic leads. By letting a continuous stream of electrons flow across the junction the molecules can interact with each other with an indirect force called exchange interaction, and those exchange interactions which are of interest in this project are described by models called the Heisenberg, the Ising and the Dzyaloshinski-Moriya models. LÄS MER
3. A lattice model for topological phases
Kandidat-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysikSammanfattning : Matter exists in many different phases, for example in solid state or in liquid phase. There are also phases in which the ordering of atoms is the same, but which differ in some other respect, for example ferromagnetic and paramagnetic states. LÄS MER
