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hep-th2008★ 17 cited
Pseudo-redundant vacuum energy
Puneet Batra, Kurt Hinterbichler, Lam Hui +1
We discuss models that can account for today's dark energy. The underlying cosmological constant may be Planck scale but starts as a redundant coupling which can be eliminated by a…
hep-th2006
Transitions Between de Sitter Minima
Puneet Batra, Matthew Kleban
We investigate the cosmological signatures of instantons mediating tunneling between de Sitter minima. For generic potentials the Coleman-de Luccia instanton does not necessarily e…