4 papers
Vacuum Polarization Energy of a Nonzero Radius Cosmic String
Noah Graham, Herbert Weigel
We calculate the vacuum polarization energy (VPE) of a scalar field in the background of a nonsingular cosmic string in spacetime dimensions. Our calculation expresses the VP…
Renormalized Quantum Stress-Energy Tensor of a Nonzero Radius Cosmic String
Noah Graham
We calculate the effects of quantum fluctuations of a scalar field in the "ballpoint pen" cosmic string geometry. Using the approach to renormalization established previously for t…
Quantum Energy Density of Cosmic Strings with Nonzero Radius
M. Koike, X. Laquidain, N. Graham
Zero-point fluctuations in the background of a cosmic string provide an opportunity to study the effects of topology in quantum field theory. We use a scattering theory approach to…
One-Loop Quantum Stress-Energy Tensor for the Kink and sine-Gordon Solitons
Noah Graham, Herbert Weigel
We compute the renormalized one-loop quantum corrections to the energy density and pressure for solitons in the dimensional scalar sine-Gordon and kin…