Sökning: "quantum phases"

Visar resultat 1 - 5 av 20 uppsatser innehållade orden quantum phases.

  1. 1. Robust non-Abelian geometric phases on three-qubit spin codes

    Master-uppsats, Uppsala universitet/Materialteori

    Författare :Parham Azish; [2024]
    Nyckelord :Quantum information theory; Holonomic quantum computing; non-abelian systems;

    Sammanfattning : Quantum holonomies are non-Abelian Geometric Phases predominantly observed in adiabatic, non-adiabatic, or measurement-based quantum evolutions. Their significance lies in their potential utility within quantum computing due to their robustness against noise throughout the parameter path. LÄS MER

  3. 2. Fano Resonances in Time-Dependent Wells

    L3-uppsats, Uppsala universitet/Materialteori

    Författare :Anton Gregefalk; [2023]
    Nyckelord :Fano resonance; Floquet scattering; Pumped shot-noise; Linear band tilt; Quadratic band touching; Time periodic Hamiltonian;

    Sammanfattning : Floquet’s theorem, a temporal analogue of Bloch’s theorem, is used for studying a time-dependent potential. With applications in cold atoms on optical lattices, quantum dots and more, there is a growing interest in Floquet engineering exotic materials and phases. LÄS MER

  4. 3. An Introduction to Symmetry Protected Topological Phases

    Kandidat-uppsats, Uppsala universitet/Teoretisk fysik

    Författare :David Petrovic; [2023]
    Nyckelord :;

    Sammanfattning : In this thesis, we aim to display characteristics of symmetry protected topological phases within quantum mechanics (QM). Building on well known aspects of QM, we relate the formalism to basic group representation theory, and review the connection between projective symmetries and protected vacuum degeneracies. LÄS MER

  5. 4. Majorana bound states in chains of interacting quantum dots

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen; Lunds universitet/NanoLund: Centre for Nanoscience

    Författare :William Samuelson; [2023]
    Nyckelord :quantum dots; superconducting proximity effect; Majorana bound states; Physics and Astronomy;

    Sammanfattning : This thesis concerns the creation of Majorana bound states (MBSs) -- a type of condensed matter excitations theorized to have exotic and technologically valuable properties. In particular, they could be used to store and manipulate quantum information in a protected way, forming the building blocks of a topological quantum computer. LÄS MER

  7. 5. Geometric Phases In Weak Measurements

    L3-uppsats, Uppsala universitet/Materialteori

    Författare :Isabela Dias; [2023]
    Nyckelord :Geometric phase; Weak measurements; Weak values;

    Sammanfattning : We explore a natural extension of the Abelian geometric phase factor in sequences of incomplete measurements to include high dimensional quantum states in the weak measurement scenario. To achieve the goal, we focus on sequential weak measurements of non-commuting projectors and combine the idea of weak measurements and the notion of a non-Abelian geometric phase. LÄS MER