B. Ovrut

Publications317
h-index58
Citations12,098
Highly Influential Citations363
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The Ekpyrotic universe: Colliding branes and the origin of the hot big bang
We propose a cosmological scenario in which the hot big bang universe is produced by the collision of a brane in the bulk space with a bounding orbifold plane, beginning from an otherwise cold,…
From big crunch to big bang
We consider conditions under which a universe contracting towards a big crunch can make a transition to an expanding big bang universe. A promising example is 11-dimensional M-theory in which the…
The Universe as a domain wall
It is shown that the effective five-dimensional theory of the strongly coupled heterotic string is a gauged version of N=1 five-dimensional supergravity with four-dimensional boundaries. For the…
On the four-dimensional effective action of strongly coupled heterotic string theory
Heterotic M-theory in five dimensions
Supersymmetry, supergravity, and particle physics
N = 1 global supersymmetry and supergravity are discussed using the superfield formalism. Supergravity particle physics theories are presented, emphasizing the role of gravitation in low energy…
New Ekpyrotic Cosmology
In this paper, we present a new scenario of the early universe that contains a pre-big bang ekpyrotic phase. By combining this with a ghost condensate, the theory explicitly violates the null energy…
Membranes and three form supergravity
Standard Models from Heterotic M-theory
We present a class of N=1 supersymmetric models of particle physics, derived directly from heterotic M-theory, that contain three families of chiral quarks and leptons coupled to the gauge group…
Higher-derivative chiral superfield actions coupled to N = 1 supergravity
We construct N=1 supergravity extensions of scalar field theories with higher-derivative kinetic terms. Special attention is paid to the auxiliary fields, whose elimination leads not only to…
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