Generalized Gaussian Effective Potential: Second-Order Thermal Corrections

QED second order corrections on the speed of light at low temperature

We want to study thermal corrections on the speed of light at low temperature considering temperature dependence of photon vacuum polarization tensor at two-loop level in the standard QED‎. It is found that the heat bath behaves as a dispersive medium for the propagation of light and reduces its speed proportional to the second order of temperature‎. ‎Similarities and differences‎, ‎in light ...

Second-order Approximate Corrections for QCD Processes

Second order noncommutative corrections to gravity

It is difficult to formulate general relativity on noncommutative spaces, and there are thus different approaches in the literature. In [1] for example a deformation of Einstein’s gravity was studied using a construction based on gauging the noncommutative SO(4,1) de Sitter group and the Seiberg-Witten map with subsequent contraction to ISO(3,1). Most recently constructions of a noncommutative ...

B Gaussian Integration Formulae 41 C Second - Order Corrections to the Field Equations 41

We give a one-parameter family of exact solutions to 4D higher-spin gauge theory invariant under a deformed higher-spin extension of SO(3, 1) and parameterized by a zero-form invariant. All higher-spin gauge fields vanish, while the metric interpolates between two asymptotically AdS4 regions via two dS3-foliated domain walls and two H3-foliated Robertson-Walker spacetimes – one in the future an...

Gaussian Effective Potential and superconductivity

The Gaussian Effective Potential in a fixed transverse unitarity gauge is studied for the static three-dimensional U(1) scalar electrodynamics (Ginzburg-Landau phenomenological theory of superconductivity). In the broken-symmetry phase the mass of the electromagnetic field (inverse penetration depth) and the mass of the scalar field (inverse correlation length) are both determined by solution o...