Dark Energy Properties in DBI Theory

Abstract

The Dirac-Born-Infeld (DBI) action from string theory provides several new classes of dark energy behavior beyond quintessence due to its relativistic kinematics. We constrain parameters of natural potentials and brane tensions with cosmological observations as well as showing how to design these functions for a desired expansion history. We enlarge the attractor solutions, including new ways of obtaining cosmological constant behavior, to the case of generalized DBI theory with multiple branes. An interesting novel signature of DBI attractors is that the sound speed is driven to zero, unlike for quintessence where it is the speed of light.

8 pages, 6 figures; v2 - minor changes, clearer figures, matches PRD version

References in corpus (4)

• Constraining dark energy with cross-correlated CMB and Large Scale Structure data
• DBI-essence
• Generalised DBI-Quintessence
• Quintessence and phantom dark energy from ghost D-branes

Cited by in corpus (26)

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• Dynamics of cosmological scalar fields
• Dark D-brane Cosmology
• In Search for Extraterrestrial High Energy Neutrinos
• Fractional Action Cosmology: Some Dark Energy Models in Emergent, Logamediate and Intermediate Scenarios of the Universe
• Cosmological Dynamics of a Dirac-Born-Infeld field
• Recent advances in cosmological singularities
• Measuring Unified Dark Matter with 3D Cosmic Shear
• Growth Rate in the Dynamical Dark Energy Models
• Cascading Dark Energy
• Enhanced Inflation in the Dirac-Born-Infeld framework
• Dark D-Brane Cosmology: from background evolution to cosmological perturbations
• Type V singularities in non-standard cosmological backgrounds
• DBI Galileon and Late time acceleration of the universe
• Assessing the foundation and applicability of some dark energy fluid models in the Dirac-Born-Infeld framework
• Constraining Models of Dark Energy
• Reconstructing FHDE with Scalar and Gauge Fields
• Type V singularities with inhomogeneous equations of state
• DBI analog of a decaying vacuum cosmology
• Variable Modified Chaplygin Gas in Anisotropic Universe with Kaluza-Klein Metric
• Effective Action of a Dynamical D$p$-brane with Background Fluxes
• Performance of Monte Carlo event generators of pp collisions at NICA energies
• Bouncing cosmologies in the presence of a Dirac-Born-Infeld field