Essays about: "Degeneracy"

Showing result 1 - 5 of 19 essays containing the word Degeneracy.

  1. 1. Classical motion in synthetic monopole fields

    University essay from Uppsala universitet/Materialteori

    Author : Ola Carlsson; [2022]
    Keywords : ;

    Abstract : In the Born-Oppenheimer approximation for a quantum system the emergent synthetic magnetic field can be seen as generated by monopoles at points of degeneracy, in full analogue to the synthetic fields generating the geometric phase of adiabatically evolving quantum systems. The plausibility of using these synthetic magnetic monopoles as a means to study magnetic monopole dynamics in the absence of fundamental magnetic monopoles has been explored. READ MORE

  3. 2. From Relations to Simplicial Complexes: A Toolkit for the Topological Analysis of Networks

    University essay from KTH/Matematik (Avd.)

    Author : Johan Lord; [2021]
    Keywords : applied algebraic topology; complex networks; topological data analysis; brain network analysis;

    Abstract : We present a rigorous yet accessible introduction to structures on finite sets foundational for a formal study of complex networks. This includes a thorough treatment of binary relations, distance spaces, their properties and similarities. READ MORE

  4. 3. Zeeman Doppler Imaging of the eclipsing binary UV Piscium

    University essay from Uppsala universitet/Observationell astrofysik

    Author : Axel Hahlin; [2020]
    Keywords : Magnetic fields; polarisation; eclipsing binary;

    Abstract : Magnetic fields are important for multiple physical processes in and around stars, for these reasons improving the understanding of how they are generated and maintained is of great value. In this work the magnetic field structure of the eclipsing binary UV Piscium is investigated. READ MORE

  5. 4. Acoustic-Inertial Forward-Scan Sonar Simultaneous Localization and Mapping

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Aldo Teran Espinoza; [2020]
    Keywords : ;

    Abstract : The increasing accessibility and versatility of forward-scan (FS) imaging sonars (also known as forward looking sonars or FLS) has spurred the interest of the robotics community seeking to solve the difficult problem of robotic perception in low-visibility underwater scenarios. Processing the incoming data from an imaging sonar is challenging, since it captures an acoustic 2D image of the 3D scene instead of providing straightforward range measurements like other sonar technologies do (e. READ MORE

  6. 5. Ensemble Green's Function Theory for Interacting Electrons with Degenerate Ground States

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

    Author : Erik Linnér; [2019]
    Keywords : Green s function; Degeneracy; Density matrix; Ensemble; GW; Zero-temperature; Finite-temperature; Hubbard model; Two-dimensional harmonic oscillator; Ising model; Hydrogen-like model; Physics and Astronomy;

    Abstract : An ensemble Green's function theory for many-electron systems with degenerate ground states, based on the von Neumann density matrix formalism, is proposed. The formalism is constructed without an assumption of an adiabatic connection. An ensemble analogue of Hedin's equations and the GW Approximation (GWA) is constructed. READ MORE