6 papers
Multiple Multidimensional Morse Wavelets
G. Metikas, S. C. Olhede
We define a set of operators that localise a radial image in radial space and radial frequency simultaneously. We find the eigenfunctions of this operator and thus define a non-sep…
Nonperturbative Effects on T_c of Interacting Bose Gases in Power-Law Traps
O. Zobay, G. Metikas, H. Kleinert
The critical temperature T_c of an interacting Bose gas trapped in a general power-law potential V(x)=\sum_i U_i|x_i|^{p_i} is calculated with the help of variational perturbation…
Thermodynamics of a trapped interacting Bose gas and the renormalization group
G. Metikas, O. Zobay, G. Alber
We apply perturbative renormalization group theory to the symmetric phase of a dilute interacting Bose gas which is trapped in a three-dimensional harmonic potential. Using Wilsoni…
The epsilon-expansion in the symmetry-broken phase of an interacting Bose gas at finite temperature
G. Metikas, O. Zobay, G. Alber
We discuss the application of the momentum-shell renormalization group method to the interacting homogeneous Bose gas in the symmetric and in the symmetry-broken phases. It is demo…
Uniqueness of the Thermal Effective Potential
Georgios Metikas
We discuss the use of derivative expansion techniques for the construction of thermal effective potentials. We present a theory for which the thermal bubble is analytic at the orig…
A Case of Well-Defined Thermal Derivative Expansion to Lowest Order
Marcelo Hott, Georgios Metikas
We examine a very simple model for which the leading contribution to the one-loop effective potential at finite temperature is uniquely defined despite the presence of the Landau t…