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11 papers · 2 filters
Cosmology and the Standard Model
James D. Bjorken
We consider the properties of an ensemble of universes as function of size, where size is defined in terms of the asymptotic value of the Hubble constant (or, equivalently, the val…
Initial Conditions for Inflation
Nemanja Kaloper, Matthew Kleban, Albion Lawrence +2
Free scalar fields in de Sitter space have a one-parameter family of states invariant under the de Sitter group, including the standard thermal vacuum. We show that, except for the…
Low-Energy Brane-World Effective Actions and Partial Supersymmetry Breaking
C. P. Burgess, E. Filotas, M. Klein +1
As part of a programme for the general study of the low-energy implications of supersymmetry breaking in brane-world scenarios, we study the nonlinear realization of supersymmetry…
Loop-Effects in Pseudo-Supersymmetry
Matthias Klein
We analyze the transmission of supersymmetry breaking in brane-world models of pseudo-supersymmetry. In these models two branes preserve different halves of the bulk supersymmetry.…
Supergravity, Dark Energy and the Fate of the Universe
Renata Kallosh, Andrei Linde, Sergey Prokushkin +1
We propose a description of dark energy and acceleration of the universe in extended supergravities with de Sitter (dS) solutions. Some of them are related to M-theory with non-com…
Geometric Constructions of Nongeometric String Theories
Simeon Hellerman, John McGreevy, Brook Williams
We advocate a framework for constructing perturbative closed string compactifications which do not have large-radius limits. The idea is to augment the class of vacua which can be…