This paper describes the 25 year effort to measure vacuum magnetic birefringence and
dichroism with the PVLAS experiment. The experiment went through two main phases: the …

Strong-field effects in laboratory and astrophysical plasmas and high intensity laser and
cavity systems are considered, related to quantum electrodynamical (QED) photon-photon …

For centuries the heavens have been a natural laboratory to test the classical laws of motion,
and more recently to test Einstein's theory of gravity. Today, astrophysics has become a vast …

We review the status and present range of applications of the “string-inspired” approach to
perturbative quantum field theory. This formalism offers the possibility of computing effective …

This book is devoted to an investigation of the vacuum of quantum elec trodynamics (QED),
relying on the perturbative effective action approach. If the vacuum is probed with external …

Recent advances in laser technology have pushed the frontier of maximum intensity
achieved to about 1022W/cm2 and investigators currently believe even higher intensities …

HeNe ring-laser gyros are standard sensors in inertial guidance; mirror reflectances now
reach 99.9999%. Present research instruments have an area of, a passive quality factor of …

We report the experimental observation of a light polarization rotation in vacuum in the
presence of a transverse magnetic field. Assuming that data distribution is Gaussian, the …

We investigate the usefulness of the “string-inspired technique” for gauge theory
calculations in a constant external field background. Our approach is based on Strassler's …

A pseudoscalar or scalar particle φ that couples to two photons but not to leptons, quarks,
and nucleons would have effects in most of the experiments searching for axions, since …