34 citations · 48 across the 5 of their papers we have counts for
14 papers
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…
Propagating phase boundaries as sonic horizons
Tanmay Vachaspati
If certain conditions are met, a propagating phase boundary can be a sonic horizon. Sonic Hawking radiation from such a phase boundary is expected in the quantum theory. The Hawkin…
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,…
Domain Wall Solutions
Tanmay Vachaspati
I describe domain walls and domain wall lattices in non-Abelian models.
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 $…