97 citations · 389 across the 13 of their papers we have counts for
13 papers
Mirage resolution of cosmological singularities
Frederic Leblond
We study time-dependent backgrounds in the low energy regimes of string theories. In particular the emphasis is on the general study of exotic phenomena such as positive accelerati…
A note on the singularity theorem for supergravity SD-branes
Frederic Leblond, Amanda W. Peet
Recently, a singularity theorem for full SD-brane spacetimes was given in hep-th/0305055. We comment on the relation between this and previous work as well as provide a more geomet…
SD-brane gravity fields and rolling tachyons
Frederic Leblond, Amanda W. Peet
S(pacelike)D-branes are objects arising naturally in string theory when Dirichlet boundary conditions are imposed on the time direction. SD-brane physics is inherently time-depende…
Tall tales from de Sitter space II: Field theory dualities
Frederic Leblond, Donald Marolf, Robert C. Myers
We consider the evolution of massive scalar fields in (asymptotically) de Sitter spacetimes of arbitrary dimension. Through the proposed dS/CFT correspondence, our analysis points…
The clash between de Sitter and anti-de Sitter space
Hassan Firouzjahi, Frederic Leblond
We investigate solutions that are dynamically evolving between asymptotically de Sitter and asymptotically anti-de Sitter regions in the context of Einstein gravity coupled to gene…
Locally wrapped D-branes
Frederic Leblond, Luc Marleau
We find examples in string theory of locally wrapped D-branes. These excitations mimic skyrmions in that they correspond to topological excitations of the scalar fields parametrizi…