Auflistung nach Schlagwort "Quantum field theory"

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  • Applying the variational principle to (1+1) dimensional relativistic quantum field theories 
    Haegeman, Jutho; Cirac, J. Ignacio; Osborne, Tobias J.; Verschelde, Henri; Verstraete, Frank (Trieste : International School for Advanced Studies, 2010)
    We extend the recently introduced continuous matrix product state (cMPS) variational class to the setting of (1+1)-dimensional relativistic quantum field theories. This allows one to overcome the difficulties highlighted ...
  • Coarse-grained distinguishability of field interactions 
    Bény, Cédric (Wien : Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften, 2018)
    Information-theoretical quantities such as statistical distinguishability typically result from optimisations over all conceivable observables. Physical theories, however, are not generally considered valid for all ...
  • Divergences in QFT on the Noncommutative Minkowski space with Grosse-Wulkenhaar potential 
    Zahn, Jochen (Trieste : International School for Advanced Studies, 2010)
    We study quantum field theory on the two-dimensional Noncommutative Minkoswki space with a Grosse-Wulkenhaar potential. We explicitly construct the retarded propagator and show that it is not a tempered distribution. This ...
  • Inferring effective field observables from a discrete model 
    Bény, Cédric (Bristol : Institute of Physics Publishing, 2017)
    A spin system on a lattice can usually be modeled at large scales by an effective quantum field theory. A key mathematical result relating the two descriptions is the quantum central limit theorem, which shows that certain ...
  • Nicolai maps in supersymmetric Yang-Mills theories 
    Rupprecht, Maximilian (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    This dissertation presents new results for the Nicolai map formalism. Integrating out all the fermionic variables of any supersymmetric field theory, one obtains a non-local theory of the remaining bosonic fields. In 1979, ...