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Showing 1 to 18 of 18 for “"XY model"”.

  1. Return to equilibrium in the XY-model

    Hume, Leigh Robert1988

    aus-cath Repository record

  2. Return to equilibrium in the XY-model

    Hume, Leigh Robert1988

    anu Repository record

  3. Contributions to the Theory of the A15 Compounds and to the Theory of the Xy-Model

    Bilbro, Griff LuhrsUniversity of Illinois at Urbana-Champaign2015

    Made available in DSpace on 2015-05-13T15:22:07Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7803938.PDF: 1447079 bytes, checksum: 3ab124f639b808da37ce1acc3a959237 (MD5) Previous issue date: 1977

    uiuc Repository record

  4. Contributions to the theory of the A15 compounds and to the theory of the XY model

    Bilbro, Griff Luhrs2011

    … introduction to the two studies Theoretical Model of Superconductivity and the Martensitic Transformation in A15 Compounds"" and ""A Comparison of Kadanoff-Migdal Renormalization with New Monte Carlo Results for the XY Model"", contained herein as appendices."

    uiuc Repository record

  5. Fourier-accelerated Langevin simulation of the frustrated XY model and simulation of the spinless and spin one-half Hubbard model

    Scheinine, Alan Louis2011

    The frustrated XY model was studied on a lattice, primarily to test the Fourier transform acceleration technique for a phase transition having more field structure than just spinwaves and vortices. Also, the spinless Hubbard model without hopping was simulated using continuous variables for the …

    uiuc Repository record

  6. Applications of Stein's method and large deviations principle's in mean-field O(N) models

    Nawaz, TayyabUniversity of Illinois at Urbana-Champaign2017

    … of this thesis, we will discuss the classical XY model on complete graph in the mean-field (infinite-vertex) limit. Using theory of large deviations and Stein's method, in particular, Cramér and Sanov-type results, we present a number of results coming from the limit theorems with rates of …

    uiuc Repository record

  7. Thermal Conductivity of Tl(2)Ba(2)CuO(6+delta) and Fluctuation Diamagnetism of YBa(2)Cu(3)O(6+x)

    Hubbard, Margaret AnneUniversity of Illinois at Urbana-Champaign2015

    … Within the anisotropic-effective-mass 3D-XY model, the change in anisotropy with reduced transition temperature is directly related to the magnitude of the fluctuation signal at T$\sb{\rm c}.$ It is found that both the ratio $\gamma$ = (m$\sb{\rm c}$/m$\sb{\rm ab}$)$\sp{1/2}$ and the …

    uiuc Repository record

  8. Quantum Entanglement: Geometric Quantification and Applications to Multi-Partite States and Quantum Phase Transitions

    Wei, Tzu-ChiehUniversity of Illinois at Urbana-Champaign2015

    … Moreover, the ground-state entanglement of the XY model in a transverse field is calculated and shown to exhibit singular behavior near the quantum critical line. Along the way, connections are pointed out between the geometric measure of entanglement, the Hartree approximation, entanglement …

    uiuc Repository record

  9. Quantum Entanglement: Geometric Quantification and Applications to Multi-partite States and Quantum Phase Transitions

    Wei, Tzu-Chieh2012

    … Moreover, the ground-state entanglement of the XY model in a transverse field is calculated and shown to exhibit singular behavior near the quantum critical line. Along the way, connections are pointed out between the geometric measure of entanglement, the Hartree approximation, entanglement …

    uiuc Repository record

  10. Effects of Non-uniform Gaussian Curvature on the Collective Motion of Active Particles

    Cowley, NatashaUniversity of Dundee2017

    … active swarms on spheres, we aim to expand the model to a range of closed surfaces of revolution, with position dependent Gaussian curvature. We explore how curvature of the surface affects the dynamics of the collective motion of the particles, coupled with the effects of orientational …

    dundee Repository record

  11. Infinite Sets of Conserved Charges and Duality in Quantum Field Theory

    Grady, Michael Patrick

    … an example the familiar two- 4 dimensional Ising model. Next, in chapter III, I show how this applies to Baxter's 8-vertex model and the XYZ Hamiltonian, and how an infinite set of conserved charges for the XYZ model arises from properties of the transfer matrix. In Chapter IV I discuss the …

    rockefeller Repository record

  12. Quantics Tensor Trains: The Study of a Continuous Lattice Model and Beyond

    Bou Comas, AleixThe Graduate School and University Center of The City University of New York2024

    … purposes. The second chapter centers around the XY model. Quantics tensor trains are used to describe the transfer matrix of the model and compute one and two-dimensional quantities. The one dimensional magnitudes are compared to analytical results with an agreement close to machine precision. As …

    cuny-grad Repository record

  13. Superfluid Density Measurements of High-Temperature Superconducting Films

    Osborn, Kevin Daniel2012

    … Bi2Sr2CaCu2O8+δ (Bi-2212) films. Two competing models of the pseudogap are compared to the temperature dependence of the superfluid density as a function of doping in Bi-2212. Near zero temperature, a maximum in the superfluid density as a function of hole doping is observed at approximately …

    uiuc Repository record

  14. Density Matrix Renormalization Group Studies of Strongly Correlated Systems in Low Dimensions

    Huang, YixuanUniversity of Houston2020

    … by the two dimensional lattice, and some models can be simplified or transformed into lower dimensions without losing information under certain situations. Here we have studied models of the electron systems in one dimension, and the spin systems in two dimension with large scale DMRG. For …

    houston Repository record

  15. Multiscale approaches on two-dimensional magnetic materials: from atomistic to mesoscale level

    Augustin, MathiasQueen's University Belfast2021

    … a multiscale approach involving atomistic scale models with Hubbard-U corrected Density Functional Theory (DFT+U) and mesoscale models with Monte-Carlo (MC) simulations. Firstly, we performed a high throughput screening over 150 compounds, identifying 59 potential two-dimensional magnets. To …

    qu-belfast Repository record

  16. On the irreversibility of collective motion in polar active matter

    Borthne, ØyvindUniversity of Cambridge2021

    … applications. • Chapter 3 – Review of the Vicsek model (VM), the ‘continuous-time Vicsek model’ (CTVM) and mean-field theory of the CTVM. This chapter also includes some unpublished results on the stability of the polar liquid phase of the CTVM in mean-field, in addition to the coarse-grained …

    cambridge Repository record

  17. Phenomenological phase-fluctuation model for the underdoped cuprates

    Eckl, ThomasUniversität Würzburg

    … thesis, a phenomenological phase-fluctuation model for the pseudogap regime of the underdoped cuprates was discussed. The key idea of the phase-fluctuation scenario in the high-T_c superconductors is the notion that the pseudogap observed in a wide variety of experiments arises from phase …

    wurz-thes Repository record

  18. Unconventional computing platforms and nature-inspired methods for solving hard optimisation problems

    Kalinin, KirillUniversity of Cambridge2021

    … condensates to represent different oscillator models. We derive analytic expressions for the interactions between two spatially separated polariton condensates and show various synchronisation regimes for periodic chains of condensates. An odd number of condensates at the vertices of a regular …

    cambridge Repository record