Essays about: "Superconductivity"

Showing result 21 - 25 of 28 essays containing the word Superconductivity.

  1. 21. Efficient Computational Procedure for the Analytic Continuation of Eliashberg Equations

    University essay from Uppsala universitet/Institutionen för teknikvetenskaper

    Author : Joakim Johansson; Fredrik Lauren; [2014]
    Keywords : superconductivity; analytic continuation; BCS theory;

    Abstract : The superconducting order parameter and the mass renormalization function can be solved either at discrete frequencies along the imaginary axis, or as a function of continuous real frequencies. The latter is done with a method called analytic continuation. READ MORE

  3. 22. Super conducting quantum bits - a comparison of different designs

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Joakim Persson; [2014]
    Keywords : ;

    Abstract : This paper treats the current progress in the research of superconducting quantum bits. It includes background theory in the two distinct fields of superconductivity and quantum bits and how these two research fields relate. Different designs of superconducting quantum bits are presented including the derivation of their respective Hamiltonian. READ MORE

  4. 23. Point defects in the (d+id)-wave superconducting state of heavily doped graphene

    University essay from Institutionen för fysik och astronomi

    Author : Tomas Löthman; [2013]
    Keywords : Graphene; Superconductivity; Defects; Van Hove singularity;

    Abstract : Previous studies have suggested that the material graphene might transition into an electron-electron interaction driven, unconventional, time-reversal-symmetry-breaking, (d+id)wave superconducting state upon either significant electron or hole doping, and, in particular, upon doping to the Van Hove singularity. As defects are likely to be introduced in the doping process, we are, in this text, concerned with the effects of defects on this superconducting state near the Van Hove singularity doping. READ MORE

  5. 24. Numerical Studies of Vortex Core States in Type II Superconductors

    University essay from Institutionen för fysik

    Author : Christin Edblom; [2012]
    Keywords : superconductivity; type II; vortex; s-wave; Bogoliubov-de Gennes; supraledning; typ II; virvel; s-våg; Bogoliubov-de Gennes;

    Abstract : In this thesis, we study an isolated vortex in an s-wave superconductor by solving the Bogoliubov-de Gennes equations self-consistently on a disc. We calculate the order parameter and supercurrent profiles, as well as the distribution of quasiparticle states. READ MORE

  6. 25. On the Properties of a Few Electron-Hole system in a Double One-dimensional Harmonic Trap

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik

    Author : Fan Pan; [2012]
    Keywords : Electron-Hole system; Few-body; CI methods; Exciton-like; Double one-dimension; harmonic trap; Physics and Astronomy;

    Abstract : One of the most important concepts in condensed matter physics is that of ``quasi particles''. The exciton is one such quasi particle. In semi-conductors, excitons are formed by the excitation of electrons from valence band to conduction band, which creates holes in the valence band. READ MORE