Sökning: "Fermi"

Visar resultat 16 - 20 av 62 uppsatser innehållade ordet Fermi.

  1. 16. Theory of Time-Dependent Transport and Levitons in Nanowires

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik

    Författare :Jakob Westerberg; [2021]
    Nyckelord :leviton; Tkwant; tight-binding model; solid-state physics; time-dependent transport; scattering theory; quantum mechanics; computer simulation; nanowire; Physics and Astronomy;

    Sammanfattning : An interesting type of quasi-particles in solid-state materials are the so-called levitons. These are single- electron excitations above the Fermi-level that do not produce any hole states when carrying an integer multiple of the elementary charge. LÄS MER

  3. 17. Constraints on the High-Energy Gamma-Ray Spectrum of Nearby Star-Forming Galaxies

    Kandidat-uppsats, Stockholms universitet/Fysikum

    Författare :Oskar Svenborn; [2021]
    Nyckelord :Gamma-ray emission; High-Energy astrophysics; Star-Forming Galaxies; Star formation; Cosmic rays; Fermi-LAT.;

    Sammanfattning : The nature of high-energy gamma-ray emission from Star-Forming Galaxies is of utmost importance for understanding both the origin of Cosmic Rays and the high-energy processes that shape galaxy formation. Observations from the gamma-ray telescope Fermi-LAT have detected gamma-ray emission from a handful of nearby Star-Forming Galaxies. LÄS MER

  4. 18. Linear-scaling Quantum Molecular Dynamics for Reactive Systems

    Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Linnéa Andersson; [2021]
    Nyckelord :;

    Sammanfattning : The purpose of this thesis is to demonstrate linear-scaling, energy stable, propagation of the electronic degrees of freedom in finite temperature ExtendedLagrangian Born-Oppenheimer Molecular Dynamics for reactive systems in aself-consistent charge density-functional tight-binding formulation. The inverse Jacobian kernel matrix in the electronic equation of motion is approximated using alow-rank combination of directional derivatives of the ground state residual function. LÄS MER

  5. 19. Magnetic field design for polarised neutrons in European Spallation Neutron Source instruments

    Kandidat-uppsats, Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Andrea Monzani; [2021]
    Nyckelord :FEM; COMSOL; uniform magnetic field; neutron scattering; European Spallation Source; neutron adiabaticity; neutron spin filtering; neutron spin transport; 3He polarisation analyser; Halbach coils; tetracoil; instrument design; neutron diffractometer; nuclear physics; material science; physics simulation; Physics and Astronomy;

    Sammanfattning : The goal of this project is the design of the magnetic field of the neutron analyser for the European Spallation Source instrument DREAM (Diffraction Resolved by Energy and Angle Measurements). This instrument is a neutron diffractometer and its purpose is the determination of the magnetic and chemical structure of materials. LÄS MER

  7. 20. A gamma-ray study of a highly variable blazar : The Fermi-LAT analysis and the modeling of the FSRQ PKS 1510–089

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Författare :Nadja Bollström; [2021]
    Nyckelord :active galactic nuclei; AGN; astrophysics; jet; PKS 1510-089; Fermi; external Compton model; gamma-rays;

    Sammanfattning : The subject of this thesis is the analysis and modeling of the active galactic nucleus PKS 1510-089. The aim is to present a thorough background of active galactic nuclei combined with the analysis and modeling of a specific active galactic nucleus. The results will then be  linked to previous research and theories about active galactic nuclei. LÄS MER