2 papers
gr-qc2004
Vacuum decay by p-branes production
Lorenzo Sindoni, Stefano Ansoldi
We present a generalization to the N-dimensional case for the nucleation coefficient of a spherical p-brane, separating two (anti-)de Sitter spacetimes. We use a semiclassical appr…
gr-qc2004
Gravitational Tunnelling of Relativistic Shells
Stefano Ansoldi, Lorenzo Sindoni
Thin shells in general relativity have been used in the past as keystones to obtain realistic models of cosmological and astrophysical situations. A crucial role for these developm…