Essays about: "xy model"
Showing result 1 - 5 of 12 essays containing the words xy model.
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1. Numerical Estimation of Critical Exponents in the 3D XY Model
University essay from KTH/FysikAbstract : The experimentally obtained value of the critical exponent ν is presently in significant disagreement with current theoretical predictions for the λ-universality class. We suggest two novel approaches of determining the exponents ν and η by utilizing the effects of finite size scaling. READ MORE
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2. An alternative explanation for scale-free speed correlations in starling flocks: coarse-graining in time
University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)Abstract : In a celebrated series of experimental observations, starling flocks have been shown to be characterized by scale-free, long-ranged spatial correlations in their velocity fluctuations. While this is expected for velocity orientation correlations on the basis of simple symmetry-breaking arguments, the same scaling-free behaviour for speed (i.e. READ MORE
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3. Modelling Ganymede’s Aurora
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : A 3D model of Ganymede’s aurora is created using captured data from the Space Telescope Imaging Spectrograph (STIS), on board the Hubble Space Telescope (HST). The data is processed into 24 images and analyzed. A 3D grid is generated around the moon to implement a functional model to describe the aurora. READ MORE
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4. Effects of power-law correlated disorder on a 3D XY model
University essay from KTH/FysikAbstract : This thesis investigates the effects of power-law correlated disorder on a three-dimensional XY model and the Weinrib-Halperin disorder relevance criterion’s pre-dictive ability. Ising models are used as a map to realise disorder couplings. READ MORE
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5. Models of superconductors with correlated defects
University essay from KTH/FysikAbstract : The quantum phase transition between groundstates of a system with correlated disorder near absolute zero is studied. The computations are based on Monte Carlo methods and the worm algorithm which is an effective method to simulate basic models like the Ising and XY model by making use of global Monte Carlo moves given by modified random walks. READ MORE