5 citations · 5 across the 1 of their papers we have counts for
7 papers
Field Theory Simulations on a Fuzzy Sphere - an Alternative to the Lattice
Julieta Medina, Wolfgang Bietenholz, Frank Hofheinz +1
We explore a new way to simulate quantum field theory, without introducing a spatial lattice. As a pilot study we apply this method to the 3d λϕ^4 model. The regularisation consist…
Matrix models on the fuzzy sphere
Brian P. Dolan, Denjoe O'Connor, Peter Presnajder
Field theory on a fuzzy noncommutative sphere can be considered as a particular matrix approximation of field theory on the standard commutative sphere. We investigate from this po…
Dimensional Crossover in the Non-Linear Sigma Model
Denjoe O'Connor, C. R. Stephens, J. A. Santiago
We consider dimensional crossover for an O(N) model on a d-dimensional layered geometry of thickness L, in the sigma-model limit, using ``environmentally friendly'' renormalization…
Universal Scaling Properties of Superconductors in Magnetic Fields
Denjoe O'Connor, C. R. Stephens
Based on renormalization group arguments we establish that for a superconductor in the presence of a weak external magnetic field, , the dependence on and the deviation from…
Finite-Temperature Renormalization Group Predictions: The Critical Temperature Exponents, and Amplitude Ratios
F. Freire, Denjoe O'Connor, C. R. Stephens +1
theory at finite temperature suffers from infrared divergences near the temperature at which the symmetry is restored. These divergences are handled using renormalization gr…
Environmentally Friendly Renormalization in Finite-Temperature Field Theory
M. A. van Eijck, Denjoe O'Connor, C. R. Stephens
Contribution to the proceedings of the NATO workshop on the Electroweak Phase Transition and the Early Universe, Sintra, March 1994. To be published by Plenum Press.