Sökning: "exact diagonalization"
Hittade 5 uppsatser innehållade orden exact diagonalization.
- Kandidat-uppsats, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen
Sammanfattning : In this work, we employ a semi-classical approach to light matter interaction to describe and char- acterize spin configurations resulting from quantum correlations between electrons created by a photoemission event and by the following Auger decay. The system studied consists of three atomic levels and two continua. LÄS MER
- Magister-uppsats, Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)
Sammanfattning : Spin-frustrated molecular triangles have four low-lying energy states, so called chiral states, which can be employed as the unit of information, qubit, in a quantum computer. The fact that the chiral states are characterized by two quantum numbers chirality and spin allows the control of the magnetization of the molecule by an electric ﬁeld due to the spin-electric interaction. LÄS MER
- Kandidat-uppsats, Uppsala universitet/Teoretisk astrofysik
Sammanfattning : This report presents the general Ising model and its basic assumptions. This study aims to, from diagonalization of the Transfer Matrix, obtain the Helmholtz free energy and the exclusion of a phase transition for the one-dimensional Ising model under an external magnetic field. LÄS MER
- Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik
Sammanfattning : This thesis investigates numerically the out of equilibrium properties of quantum rings with magnetic impurities, using the periodic Anderson model (PAM). The model is a simple template for the discussion of the physics of regular arrays of rare-earth impurities in metallic hosts. LÄS MER
- Kandidat-uppsats, Linnéuniversitetet/Institutionen för datavetenskap, fysik och matematik, DFM
Sammanfattning : We consider a system of few electrons trapped in a two-dimensional circularquantum dot with harmonic confinement and in the presence of ahomogeneous magnetic field, with focus on the role of e-e interaction. Byperforming the exact diagonalization of the Hamiltonian in second quantization,the low-lying energy levels for spin polarized system are obtained. LÄS MER