34 citations · 48 across the 5 of their papers we have counts for
6 papers · 1 filter
511 KeV photons from superconducting cosmic strings
Francesc Ferrer, Tanmay Vachaspati
We show that a tangle of light superconducting strings in the Milky Way could be the source of the observed 511 KeV emission from electron-positron annihilation in the Galactic bul…
Eternal inflation and energy conditions in de Sitter spacetime
Tanmay Vachaspati
Eternal inflation is shown to require violations of the Null Energy Condition (NEC) on superhorizon scales. With light scalar fields as the matter sources in a de Sitter background…
A post-WMAP perspective on inflation
Arthur Lue, Glenn D. Starkman, Tanmay Vachaspati
Recent results from the Wilkinson Microwave Anisotropy Probe have been called a corroboration, or even a confirmation, of inflation. Yet, the results include features that require,…
Primordial magnetic fields and CP violation in the sky
Tanmay Vachaspati
It has been argued that electroweak baryogenesis generates a left-handed primordial magnetic field. The helicity density of the primordial magnetic field today is estimated to be $…
Formation, Interaction and Observation of Topological Defects
Tanmay Vachaspati
In these lectures, I describe the formation of defect distributions in first-order phase transitions, then briefly discuss the relevance of defect interactions after a phase transi…
Topological Defects in Cosmology
Tanmay Vachaspati
The scenario of a cosmology with topological defects is surveyed starting from the field theoretic aspects and ending with a description of large-scale structure formation and magn…