450 citations
- Philadelphia UniversityUS4 papers
- European Organization for Nuclear ResearchCH2 papers
- Max Planck Institute for PhysicsDE2 papers
- National University of Sciences and TechnologyPK2 papers
- University of PennsylvaniaUS2 papers
- Albert Einstein College of MedicineUS1 paper
- California Institute of TechnologyUS1 paper
- Center for Theoretical PhysicsPL1 paper
- Institute for Advanced StudyUS1 paper
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT1 paper
- Laboratoire de Physique ThéoriqueFR1 paper
- Ludwig-Maximilians-Universität MünchenDE1 paper
5 papers · 1 filter
Holographic dark energy with varying gravitational constant
Mubasher Jamil, Emmanuel N. Saridakis, M. R. Setare
We investigate the holographic dark energy scenario with a varying gravitational constant, in flat and non-flat background geometry. We extract the exact differential equations det…
Stability Walls in Heterotic Theories
Lara B. Anderson, James Gray, Andre Lukas +1
We study the sub-structure of the heterotic Kahler moduli space due to the presence of non-Abelian internal gauge fields from the perspective of the four-dimensional effective theo…
Comments on Orientifolds without Vector Structure
Constantin Bachas, Massimo Bianchi, Ralph Blumenhagen +2
We revisit type I compactifications with a Spin(32)/Z2 gauge bundle that admits no vector structure. We elucidate the relation of this Z2 obstruction to discrete B-field flux and t…
Lifting D-Instanton Zero Modes by Recombination and Background Fluxes
Ralph Blumenhagen, Mirjam Cvetic, Robert Richter +1
We study the conditions under which D-brane instantons in Type II orientifold compactifications generate a non-perturbative superpotential. If the instanton is non-invariant under…
On the Initial Conditions in New Ekpyrotic Cosmology
Evgeny I. Buchbinder, Justin Khoury, Burt A. Ovrut
New Ekpyrotic Cosmology is an alternative scenario of early universe cosmology in which the universe existed before the big bang. The simplest model relies on two scalar fields, wh…