Essays about: "Hamiltonian mechanics"

Showing result 11 - 15 of 21 essays containing the words Hamiltonian mechanics.

  1. 11. Gap properties of helical edge states in two-dimensional topological insulators with time-dependent magnetic impurities

    University essay from Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Author : Simon Wozny; [2020]
    Keywords : topological insulators; edge states; impurities; density of states; Green s function; Floquet; Physics and Astronomy;

    Abstract : The quantum mechanical equivalent of the classical Hall effect can lead to interesting results in solid state physics. A similar effect, that has received attention in recent years, occurs when large spin-orbit coupling is present in a material, the so-called quantum-spin Hall effect. READ MORE

  3. 12. Finite-dimensional PT-symmetric Hamiltonians with an application to neutrino oscillations

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Alexander Fagerlund; Chistopher Ekman; [2020]
    Keywords : ;

    Abstract : In this report, we first briefly summarize Hermitian quantum mechanics before moving on to the non-Hermitian case. We then review PT-symmetric quantum mechanics with a focus on finite-dimensional systems, and include a novel generalization of a perturbative calculation of the C-operator. READ MORE

  4. 13. Investigating the GW self-energy of the homogeneous electron gas in real space

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

    Author : Zhen Zhao; [2018]
    Keywords : GW method; self energy; screened-exchange; Coulomb-hole; Physics and Astronomy;

    Abstract : The real space behavior of the GW self-energy in the electron gas model was investigated in this thesis work. The self-energy is naturally decomposed into the screened-exchange and the Coulomb-hole components. READ MORE

  5. 14. A Microcanonical Comparison of Richardsons Equations With The BCS Mean Field Approximation

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

    Author : David From; [2016]
    Keywords : Physics and Astronomy;

    Abstract : The exact solution of the reduced pairing Hamiltonian is compared to the BCS mean field approximation for low particle numbers in finite systems. A combination of two different methods for solving the Richardson equations is presented. One of the methods originally intended to be solved analytically is instead adapted to a numerical scheme. READ MORE

  6. 15. The Dirac Equation in the Low Energy Limit

    University essay from Umeå universitet/Institutionen för fysik

    Author : Björn Linder; [2016]
    Keywords : ;

    Abstract : The purpose of this work is to give an introduction to relativistic quantum mechanics for the electron. First a review of the Dirac equation and its application to a free electron and an electron in an electromagnetic field will be given. In particular the hydrogen atom is studied. READ MORE