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4 papers · 1 filter
Strings in Plane Wave Backgrounds Revisited
O. Jofre, C. Núñez
String theory in an exact plane wave background is explored. A new example of singularity in the sense of string theory for nonsingular spacetime metric is presented. The 4-tachyon…
Quantum Electrodynamics in the Gravitational Field of a Cosmic String
Vladimir Skarzhinsky, Diego Harari, Ulf Jasper
We evaluate the cross section for electron-positron pair production by a single high energy photon in the space-time of a static, straight cosmic string. Energy and momentum conser…
Supersymmetry and Bogomol'nyi equations in the Abelian Higgs Model
José Edelstein, Carlos Nuñez, Fidel Schaposnik
The N=2 supersymmetric extension of the 2+1 dimensional Abelian Higgs model is discussed. By analysing the resulting supercharge algebra, the connection between supersymmetry and B…
Polarization of the Microwave Background in Inflationary Cosmology
Diego Harari, Matias Zaldarriaga
We evaluate the large scale polarization of the cosmic microwave background induced, via Thomson scattering prior to decoupling, by nearly scale-invariant spectra of scalar and ten…