Cavity quantum electrodynamics (cavity QED) is conventionally described by the Jaynes- or Tavis-Cummings model, where emitters couple to a single-mode cavity. The opposite scenario, in which an ensemble of couples single spatial mode propagating light field, waveguide QED, interact with continuum frequency modes. Here we present experiment cold atoms strongly fiber-ring resonator variable lengt...

Soft gluon radiation induced by multiple scattering of a fast quark or gluon propagating through QCD matter is discussed. After revisiting the Landau-Pomeranchuk-Migdal effect in QED we show that large formation times of bremsstrahlung quanta determine the QCD radiation intensity (in analogy to QED) and derive the gluon energy spectrum. Coherent suppression takes place as compared to the Bethe-...

A previous report described a computer program called GRASP which performs qualitative graphical reasoning by means of cartesian coordinate sketch graphs. This report extends the ideas advanced, and gives more details on the workings of the implemented program. An application program called QED is also described. QED interrogates a database to find items of data which match or nearly match the ...

The growing trend of nomadic and mobile computing raises serious security concerns. Nomadicity has become common; users are in constant transit, migrating with their mobile devices through many diverse wireless environments. Some users are innocent—potentially vulnerable, but benign—while others are malicious or carry compromised devices. The mobile commons brings all of these users and devices...

Ultra-magnetized plasmas, where the magnetic field strength exceeds Schwinger of about BQ≈4×1013 G, become great scientific interest, thanks to current advances in laser-plasma experiments and astrophysical observations magnetar emission. These demand better understanding how quantum electrodynamics (QED) effects influence collective plasma phenomena. In particular, Maxwell's equations nonlinea...

Here we discuss the ultraviolet and infrared aspects of the noncommutative counterpart of QED, which is called as noncommutative QED, as well as some infrared dynamics of noncommutative Yang-Mills (NCYM) theory. First we demonstrate that the divergence in the theory can be subtracted by the similar counterterms as in ordinary theory at one loop level. Then the anomalous magnetic moment is calcu...

On account of its application to the present and future analysis of the virtual photon correction to the hadronic properties by means of lattice QCD simulation, we initiate the study of the finite size scaling effect on the QED correction using low energy effective theory of QCD with QED. For this purpose, we begin with formulating a new QED on the space with finite volume. By adapting this for...

High-precision relativistic atomic structure calculations based on the relativistic many-body perturbation theory and the relativistic configuration-interaction method are shown to provide stringent tests of strong-field quantum electrodynamic (QED) corrections when compared with electron beam ion trap measurements of the spectra of highly-charged, manyelectron ions. It is further shown that th...

We review the effects of strong background fields in noncommutative QED. Beginning with the noncommutative Maxwell and Dirac equations, we describe how combined noncommutative and strong field effects modify the propagation of fermions and photons. We extend these studies beyond the case of constant backgrounds by giving a new and revealing interpretation of the photon dispersion relation. Cons...