Sökning: "critical transitions"

Visar resultat 11 - 15 av 125 avhandlingar innehållade orden critical transitions.

  1. 11. Computer Simulations of Simple Liquids with Tetrahedral Local Order : the Supercooled Liquid, Solids and Phase Transitions

    Författare :Måns Elenius; Mikhail Dzugutov; Jonathan Doye; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Simple liquids; glasses; liquid-glass transition; supercooled liquids; tetrahedral liquids; phase transitions; quasicrystals; molecular dynamics; Condensed matter physics; Kondenserade materiens fysik; Liquid physics; Vätskefysik; numerisk analys; Numerical Analysis;

    Sammanfattning : The understanding of complex condensed matter systems is an area of intense study. In this thesis, some properties of simple liquids with strong preference for tetrahedral local ordering are explored. These liquids are amenable to supercooling, and give complex crystalline structures on eventual crystallisation. LÄS MER

  3. 12. Density-matrix renormalization-group analysis of quantum phase transitions in disordered spin chains

    Författare :Laura Gabriela Urba; KTH; []
    Nyckelord :Quantum Phase Transitions; Spin Chains; Disordered Systems; Critical Phenomena;

    Sammanfattning : .... LÄS MER

  4. 13. On the Role of Envisioned Futures in Sustainability Transitions

    Författare :Alexandra Nikoleris; Miljö- och energisystem; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; förväntningar; socio-teknisk förändring; framtidsbilder; envisioned futures; sustainability transitions; expectations; structure and agency;

    Sammanfattning : Different kinds of representations of the future are often asked for in order to motivate and inspire societal change. These envisioned futures can be based on political or behavioural change, or may visualize technical developmentwhich could help us solve complex societal problems. LÄS MER

  5. 14. A Matter of Disorder : Monte Carlo Simulations of Phase Transitions in Strongly Disordered Systems

    Författare :Marios Nikolaou; Mats Wallin; Asle Sudbø; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phase transitions; disorder; Monte Carlo simulations; superconductivity; Statistical physics; Statistisk fysik;

    Sammanfattning : Phase transitions and their critical scaling properties, especially in systems with disorder, are important both for our theoretical understanding of our environment, but also for their practical use in applications and materials in our everyday life. This thesis presents results from finite size scaling analysis of critical phenomena in systems with disorder, using high-precision Monte Carlo simulations and state of the art numerical methods. LÄS MER

  7. 15. Phase transitions in magnetic metamaterials

    Författare :Björn Erik Skovdal; Björgvin Hjörvarsson; Vassilios Kapaklis; Gunnar K. Pálsson; Peter Schiffer; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Magnetic metamaterials; artificial spin ice; mesospins; magnetic nanostructures; mesoscopic spin systems; multiscale materials; tri-criticality; emergence; edge modes;

    Sammanfattning : Magnetic metamaterials consisting of arrays of densely packed, two-dimensional nanoscale magnetic islands have degrees of freedom on two separate length scales: inside the islands, and among them. These degrees of freedom can be tuned by e.g. size, shape, island separation and lattice geometry. LÄS MER