6 papers
Singular Mapping for a -Symmetric Sinusoidal Optical Lattice at the Symmetry-Breaking Threshold
H. F. Jones
A popular -symmetric optical potential (variation of the refractive index) that supports a variety of interesting and unusual phenomena is the imaginary exponential, the limiti…
Non-perturbative calculations of a global U(1) theory at finite density and temperature
T. S. Evans, H. F. Jones, D. Winder
We use an optimised hopping parameter expansion for the free energy (linear delta expansion) to study the phase transitions at finite temperature and finite charge density in a glo…
Quantum Dynamics of the Slow Rollover Transition in the Linear Delta Expansion
H. F. Jones, P. Parkin, D. Winder
We apply the linear delta expansion to the quantum mechanical version of the slow rollover transition which is an important feature of inflationary models of the early universe. Th…
The Renormalized Thermal Mass with Non-Zero Charge Density
H. F. Jones, Philip Parkin
The linear expansion is used to obtain corrections up to O to the self-energy for a complex scalar field theory with a interaction at high temperature…
On the Phase Structure of the 3D SU(2)--Higgs Model and the Electroweak Phase Transition
T. S. Evans, H. F. Jones, A. Ritz
The phase structure of the 3D SU(2)--Higgs model, the dimensionally reduced effective theory for the electroweak model at finite temperature, is analysed on the lattice using a var…
Extended Variational Approach to the SU(2) Mass Gap on the Lattice
J. O. Akeyo, H. F. Jones, C. S. Parker
The linear delta expansion is applied to a calculation of the SU(2) mass gap on the lattice. Our results compare favourably with the strong-coupling expansion and are in good agree…