Sökning: "Ising model"

Visar resultat 1 - 5 av 19 uppsatser innehållade orden Ising model.

  1. 1. Z2-Gauge Theory with Matter : Dispersive behaviour of a dimer in a 1+1-dimensional lattice

    Kandidat-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Filip Ekblom; [2023]
    Nyckelord :Spin chain; Ising model; Dimer; Lattice; Lattice gauge theory;

    Sammanfattning : The intention with this thesis is to investigate a dimer in a spin chain. Inorder to do that, a model from Z2-gauge theory is taken as the theoretical motivation to construct a discrete lattice with Ising spin properties. A dimer is then allowed to exist indirectly in the empty space between sites. LÄS MER

  3. 2. On a mission of reducing methane burps: A case study of commercialising a low-carbon innovation in the food industry

    Master-uppsats, Lunds universitet/Produktionsekonomi

    Författare :Clara Swanbeck; Saga Ising; [2022]
    Nyckelord :low-carbon innovation; b2b and b2c commercialisation; methane-reducing feed supplement; stakeholder mapping; sustainable food system; Technology and Engineering;

    Sammanfattning : Commercialising low-carbon innovations implies complex issues to be managed but is a necessity to attain a transition of industries for a sustainable future. This thesis investigates how an innovator can facilitate the adoption of their low-carbon innovation among stakeholders within the food industry. LÄS MER

  4. 3. Aspects of Conformal Field theory

    Kandidat-uppsats, Uppsala universitet/Teoretisk fysik

    Författare :Axel Agback; [2022]
    Nyckelord :Conformal field theory; Ising model; minimal models; Quantum field theory;

    Sammanfattning : Quantum field theories are very good at describing the world around us but use complicated computations that cannot always be solved exactly. Introducing conformal symmetry to quantum field theory can reduce this complexity and allow for quite simple calculation in the best case. LÄS MER

  5. 4. Effects of power-law correlated disorder on a 3D XY model

    Master-uppsats, KTH/Fysik

    Författare :Philip Broms; [2022]
    Nyckelord :Condensed matter physics; Ising model; XY model; Markov Chain Monte Carlo; Phase transition; Disorder; Theoretical physics; Wolff algorithm; Kondenserade materians teori; Isingmodell; XY-modell; Markovkedje-Monte Carlo-metoder; Teoretisk fysik; Oordning; Fasövergångar; Wolffalgoritmen;

    Sammanfattning : This thesis investigates the effects of power-law correlated disorder on a three-dimensional XY model and the Weinrib-Halperin disorder relevance criterion’s pre-dictive ability. Ising models are used as a map to realise disorder couplings. LÄS MER

  7. 5. Models of superconductors with correlated defects

    Master-uppsats, KTH/Fysik

    Författare :Jakob Bolin; [2022]
    Nyckelord :Quantum phase transition; correlated disorder; 3D XY model; Monte Carlo simulation; worm algorithm; winding number; superfluid density; Kvantfasövergång; korrelerad oordning; 3D XY modell; Monte Carlo simulering; worm algoritmen; vindlingstal; supraledande täthet;

    Sammanfattning : The quantum phase transition between groundstates of a system with correlated disorder near absolute zero is studied. The computations are based on Monte Carlo methods and the worm algorithm which is an effective method to simulate basic models like the Ising and XY model by making use of global Monte Carlo moves given by modified random walks. LÄS MER