BPS Branes in Cosmology

Abstract

The possibility to study the M/string theory cosmology via 5d bulk & brane action is investigated. The role of the 4-form field in the theory of BPS branes in 5d is clarified. We describe arguments suggesting that the effective 4d description of the universe in the ekpyrotic scenario (hep-th/0103239) should lead to contraction rather than expansion of the universe. To verify these arguments, we study the full 5d action prior to its integration over the 5th dimension. We show that if one adds the potential V(Y) to the action of the bulk brane, then the metric ansatz used in the ekpyrotic scenario does not solve the dilaton and gravitational equations. To find a consistent cosmological solution one must use a more general metric ansatz and a complete 5d description of the brane interaction instead of simply adding an effective 4d bulk brane potential V(Y).

18 pages, revtex

References in corpus (8)

• The Ekpyrotic Universe: Colliding Branes and the Origin of the Hot Big Bang
• The Inflationary Brane-Antibrane Universe
• New Formulations of D=10 Supersymmetry and D8-O8 Domain Walls
• Pyrotechnic Universe
• Hypermultiplets, domain walls and supersymmetric attractors
• Off-Shell Formulation of Supergravity on Orbifold
• Brane-World Inflation and the Transition to Standard Cosmology
• Brane plus Bulk Supersymmetry in Ten Dimensions

Cited by in corpus (58)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• The Ekpyrotic Universe: Colliding Branes and the Origin of the Hot Big Bang
• The Pre-Big Bang Scenario in String Cosmology
• From Big Crunch to Big Bang
• Quantum Nature of the Big Bang: An Analytical and Numerical Investigation
• Inflationary Cosmology
• On the Generation of a Scale-Invariant Spectrum of Adiabatic Fluctuations in Cosmological Models with a Contracting Phase
• Lectures on string/brane cosmology
• Kasner and Mixmaster behavior in universes with equation of state w \ge 1
• Cosmology With Negative Potentials
• Instability of Spacelike and Null Orbifold Singularities
• On the Construction of Nonsingular Pre-Big-Bang and Ekpyrotic Cosmologies and the Resulting Density Perturbations
• Pyrotechnic Universe
• Primordial perturbations in a non singular bouncing universe model
• Time Evolution in Open String Theory
• Adiabatic perturbations in pre big bang models: matching conditions and scale invariance
• Localisation of massive fermions on the brane
• Passing through the bounce in the ekpyrotic models
• Non-Gaussianities from ekpyrotic collapse with multiple fields
• Supergravity, Dark Energy and the Fate of the Universe
• Cosmological structure problem of the ekpyrotic scenario
• Parametric amplification of metric fluctuations through a bouncing phase
• The Cyclic Model Simplified
• A new duality relating density perturbations in expanding and contracting Friedmann cosmologies
• On the "Causality Argument" in Bouncing Cosmologies
• Shift Symmetry and Inflation in Supergravity
• Cyclic Universes from General Collisionless Braneworld Models
• Vector Perturbations in a Contracting Universe
• Comment on "Density perturbations in the ekpyrotic scenario"
• Patch dualities and remarks on nonstandard cosmologies
• Inflation with the Starobinsky potential in Loop Quantum Cosmology
• Cosmic Perturbations Through the Cyclic Ages
• The New Ekpyrotic Ghost
• On the new string theory inspired mechanism of generation of cosmological perturbations
• Vacuum Energy and Cosmological Supersymmetry Breaking in Brane Worlds
• On adiabatic perturbations in the ekpyrotic scenario
• Cosmology with Radion and Bulk Scalar Field in Two Branes Model
• Adiabatic and entropy perturbations propagation in a bouncing Universe
• Brane Gravity at Low Energy
• Inflationary Theory versus Ekpyrotic/Cyclic Scenario
• Anisotropic Pressures at Ultra-stiff Singularities and the Stability of Cyclic Universes
• Moving Five-Branes in Low-Energy Heterotic M-Theory
• Curved 11D Supergeometry
• Perturbations in a Bouncing Brane Model
• Brany Liouville Inflation
• Baryogenesis by Brane-Collision
• On ekpyrotic brane collisions
• Cosmological matching conditions
• Effective action for the homogeneous radion in brane cosmology
• M-Theory Moduli Space and Cosmology
• From Big Crunch to Big Bang: A Quantum String Cosmology Perspective
• A primer on the ekpyrotic scenario
• Moving Five-Branes and Membrane Instantons in Low Energy Heterotic M-Theory
• Brane-Worlds and the Calabi-Yau Complex Structure Moduli
• Time-dependent toroidal compactification proposals and the Bianchi type II model: classical and quantum solutions
• The Stability of Branonium
• BPS brane cosmology in N=2 supergravity
• F0 fluxbranes, F-walls and new brane worlds