Essays about: "quantum Hall effect"

Showing result 1 - 5 of 10 essays containing the words quantum Hall effect.

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

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Markus Berthilsson; [2022]
    Keywords : Technology and Engineering;

    Abstract : 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. READ MORE

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

    University essay from KTH/Fysik

    Author : Yashar Honarmandi; [2022]
    Keywords : 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;

    Abstract : 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. READ MORE

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

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

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

    Abstract : 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. READ MORE

  5. 4. The Quantum Hall Effect

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Conrad Grälls; [2020]
    Keywords : quantum hall effect; QHE; fractional quantum hall effect; FQHE; hall effect;

    Abstract : 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. READ MORE

  6. 5. 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