Sökning: "quantum hall effect"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden quantum hall effect.

  1. 1. Simulating the Effect of Spatial Potential Variation in Nanodevices with the NEGF Method

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Markus Berthilsson; [2022]
    Nyckelord :Technology and Engineering;

    Sammanfattning : In this master thesis nanowires have been simulated to study the effect of spatial imperfections in the nanowires. This spatial imper- fection took the form of potential fluctuations in the conduction band across the wire. LÄS MER

  3. 2. Higher Forms and Dimensional Hierarchy in Topological Condensed Matter

    Master-uppsats, KTH/Fysik

    Författare :Yashar Honarmandi; [2022]
    Nyckelord :Theoretical physics; topological quantum matter; parametrized systems; Berry phase; higher Berry curvature; effective field theory; topological action; topological insulators; dimensional hierarchy; Teoretisk fysik; topologisk kvantmateria; parametriserade system; Berryfas; högre Berrykrökning; effektiv fältteori; topologisk verkan; topologiska isolatorer; dimensionshierarki;

    Sammanfattning : This report discusses higher differential forms with applications in the study of topological phenomena. The integer quantum Hall effect is first discussed, demonstrating a connection between models on a lattice and quantum field theories bridged by a topological invariant, namely the Chern number. LÄS MER

  4. 3. Active stabilisation of a micro-sized fibre cavity using tilt locking to enable quantum operations on single ions

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Jannek Hansen; [2021]
    Nyckelord :Quantum computation; optical cavity; microcavity; locking; tilt locking; cavity stabilization; Gaussian-Hermitian modes; quantum computer; higher-order transverse modes; Physics and Astronomy;

    Sammanfattning : In this thesis, the tilt locking scheme is applied to create an error signal that monitors length changes in a fibre-based microcavity. To find a robust and precise locking technique is an essential step towards quantum operations on single rare-earth ions doped in microcrystals. Quantum computing and information is a frontier of modern physics. LÄS MER

  5. 4. Hall Measurements at Cryogenic Temperatures

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Viktor Wallén; [2021]
    Nyckelord :Hall measurement; Hall effect; Cryoelectronics; Cryogenics; Subthreshold slope; Subthreshold swing; Mobility; Carrier Concentration; Resistivity; Boltzmann limit; van der Pauw measurement; Semiconductor; Nanoelectronics; Nanophysics; Solid state physics; Technology and Engineering;

    Sammanfattning : Kryoelektronik är av allt större intresse inom många tillämpningar, exempelvis för utveckling av kvantdatorer. Detta arbete vill därför undersöka de effekter kryogeniska temperaturer (under 10 K) har på halvledarkomponenter och deras elektriska egenskaper. Särskilt intressant är effekten på subthreshold swing (SS). LÄS MER

  7. 5. The Quantum Hall Effect

    Kandidat-uppsats, Uppsala universitet/Teoretisk fysik

    Författare :Conrad Grälls; [2020]
    Nyckelord :quantum hall effect; QHE; fractional quantum hall effect; FQHE; hall effect;

    Sammanfattning : The quantum Hall effect occurs when a conductor carrying a current is placed in a perpendicular magnetic field. If certain conditions are met, such as strong magnetic field and low temperature, the resistivity becomes quantised, taking values of integer or fractional multiples of h/e2. LÄS MER