Search for dissertations about: "non-abelian states"

Showing result 1 - 5 of 7 swedish dissertations containing the words non-abelian states.

  2. 1. Abelian and non-abelian quantum Hall hierarchies

    Author : Yoran Tournois; Maria Hermanns; Kareljan Schoutens; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; fractional quantum hall effect; conformal field theory; Ginzburg-Landau-Chern-Simons; Chern-Simons; wave functions; anyons; fractional statistics; braiding; composite bosons; teoretisk fysik; Theoretical Physics;

    Abstract : A core tenet of condensed matter physics has been that different phases of matter can be classified according to Landau's symmetry breaking paradigm. It has become clear, however, that phases of matter exist that are not distinguished by symmetry, but rather by topology. READ MORE

  4. 2. Quasielectrons in Abelian and non-Abelian Quantum Hall States

    Author : Maria Hermanns; Thors Hans Hansson; Steven Simon; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantum Hall effect; Condensed matter physics; Kondenserade materiens fysik; teoretisk fysik; Theoretical Physics;

    Abstract : Strongly correlated electron systems continue to  attract a lot of interest. Especially two-dimensional electron systems have shown many surprising behaviours. A fascinating example is the quantum Hall effect, which arises when electrons are confined to two dimensions, subjected to a very large magnetic field, and cooled to very low temperatures. READ MORE

  5. 3. Non-abelian quantum Hall states and fractional charges in one dimension

    Author : Emma Wikberg; Anders Karlhede; Edwin Langmann; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; teoretisk fysik; Theoretical Physics;

    Abstract : The fractional quantum Hall effect has, since its discovery around 30 years ago, been a vivid field of research—both experimentally and theoretically. In this thesis we investigate certain non-abelian quantum Hall states by mapping the two-dimensional system onto a thin torus, where the problem becomes effectively one-dimensional and hopping is suppressed, meaning that the classical electrostatic interaction dominates. READ MORE

  6. 4. One-dimensional theory of the quantum Hall system

    Author : Emil Johansson Bergholtz; Anders Karlhede; Nicholas Read; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; fractional quantum Hall effect; thin torus; spin chains; conformal field theory; strong correlations; non-abelian states; Condensed matter physics; Kondenserade materiens fysik; Theoretical Physics; teoretisk fysik;

    Abstract : The quantum Hall (QH) system---cold electrons in two dimensions in a perpendicular magnetic field---is a striking example of a system where unexpected phenomena emerge at low energies. The low-energy physics of this system is effectively one-dimensional due to the magnetic field. READ MORE

  7. 5. Quantum Holonomy for Many-Body Systems and Quantum Computation

    Author : Vahid Azimi Mousolou; Erik Sjöqvist; Rosario Fazio; Linnéuniversitetet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Quantum holonomy; geometric phase; quantum correlations; quantum phase transitions; quantum computation; Natural Science; Naturvetenskap; Physics; Fysik;

    Abstract : The research of this Ph. D. thesis is in the field of Quantum Computation and Quantum Information. A key problem in this field is the fragile nature of quantum states. READ MORE