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Showing 1 to 2 of 2 for “"lattice artifacts"”.
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Two topics in non-perturbative lattice field theories : the U(1) quantum link model and perfect actions for scalar theories
This thesis deals with two topics in lattice field theories. In the first part we discuss aspects of renormalization group flow and non-perturbative improvement of actions for scalar theories regularized on a lattice. We construct a perfect action, an action which is free of lattice artifacts, for …
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Comparison of exact and numerical results in theXY model
Es wurden neuerdings exakte Formeln für die Berechnung der Energieniveaus des sine-Gordon-Modells (im endlichen Volumen) vorgestellt. Die Herleitung der Resultate ist mathematisch nicht ganz rigoros, weshalb eine numerische Überprüfung wünschenswert ist. Simuliert wird das XY-Modell in zwei …