Sökning: "non abelian"

Visar resultat 1 - 5 av 20 uppsatser innehållade orden non abelian.

  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. Asymptotic Symmetries and Dressed States in QED and QCD

    Master-uppsats, Stockholms universitet/Fysikum

    Författare :Saimeng Zhou; [2023]
    Nyckelord :Dressed states; Large gauge transformation; Faddeev-Kulish formalism; Generalized coherent state operator; Wilson line; Infrared divergence; Asymptotic Hamiltonian; QED; QCD;

    Sammanfattning : Infrared divergences arising in theories with massless gauge bosons have been shown to cancel in scattering amplitudes when using dressed states constructed from the Faddeev- Kulish approach to the asymptotic states. It has been established that these states are closely related to asymptotic symmetries of the theory, that is, non-vanishing gauge trans- formations at the asymptotic boundary. LÄS MER

  4. 3. 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

  5. 4. Time-optimal holonomic quantum computation

    L3-uppsats, Uppsala universitet/Materialteori

    Författare :Gabriel O. Alves; [2022]
    Nyckelord :Holonomic quantum computation; Open quantum systems; Non-adiabatic quantum gate; Geometrical phase;

    Sammanfattning : A three-level system can be used in a Λ-type configuration in order to construct auniversal set of non-adiabatic quantum gates through the use of non-Abelian non-adiabatic geometrical phases. Such construction allows for high-speed operation times which diminish the effects of decoherence. LÄS MER

  7. 5. Holonomic Optimal Control for Qudits

    Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Tomas André; [2022]
    Nyckelord :;

    Sammanfattning : Non-adiabatic Holonomic Quantum Computation (NHQC) is a method used to implement quantum gates with holonomies that arise solely from non-Abelian geometric phases. Due to high noise tolerance these phases can be used to construct resiliant quantum gates. LÄS MER