ar X iv : h ep - t h / 01 11 13 1 v 1 1 4 N ov 2 00 1 Vacuum Polarization of a Scalar Field in a Rectangular Waveguide

ar X iv : h ep - t h / 01 10 29 0 v 1 3 1 O ct 2 00 1 Vacuum Stress Tensor of a Scalar Field in a Rectangular Waveguide

Using the heat kernel method and the analytic continuation of the zeta function, we calculate the canonical and improved vacuum stress tensors, T µν (x) and Θ µν (x), associated with a massless scalar field confined in the interior of an infinitely long rectangular waveguide. The local depence of the renormalized energy for two special configurations when the total energy is positive and negati...

ar X iv : h ep - p h / 01 11 04 9 v 1 6 N ov 2 00 1 The QCD Phase Diagram and Explosive Astrophysics

ar X iv : h ep - l at / 0 01 10 26 v 2 1 3 N ov 2 00 0 1 QCD vacuum structure

Several issues related to the structure of the QCD vacuum are reviewed. We concentrate mostly on results concerning instantons and center vortices.

ar X iv : h ep - l at / 0 01 10 26 v 1 3 N ov 2 00 0 1 QCD vacuum structure

Several issues related to the structure of the QCD vacuum are reviewed. We concentrate mostly on results concerning instantons and center vortices.

ar X iv : h ep - p h / 01 11 44 7 v 1 3 0 N ov 2 00 1 Photon splitting in atomic fields

Photon splitting due to vacuum polarization in the electric field of an atom is considered. We survey different theoretical approaches to the description of this nonlinear QED process and several attempts of its experimental observation. We present the results of the lowest-order perturbation theory as well as those obtained within the quasiclassical approximation being exact in the external fi...