Rolling Tachyon

Abstract

We discuss construction of classical time dependent solutions in open string (field) theory, describing the motion of the tachyon on unstable D-branes. Despite the fact that the string field theory action contains infinite number of time derivatives, and hence it is not a priori clear how to set up the initial value problem, the theory contains a family of time dependent solutions characterized by the initial position and velocity of the tachyon field. We write down the world-sheet action of the boundary conformal field theories associated with these solutions and study the corresponding boundary states. For D-branes in bosonic string theory, the energy momentum tensor of the system evolves asymptotically towards a finite limit if we push the tachyon in the direction in which the potential has a local minimum, but hits a singularity if we push it in the direction where the potential is unbounded from below.

LaTeX file, 20 pages, references added

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• Spinor model of a perfect fluid and their applications in Bianchi type-I and FRW models
• Tachyon Field in Cosmology
• Exact time-localized solutions in Vacuum String Field Theory
• Formation of monopoles and domain walls after brane inflation
• A solution to the 4-tachyon off-shell amplitude in cubic string field theory
• Exact potential and scattering amplitudes from the tachyon non-linear $\beta$-function
• On the consistency of tachyon warm inflation with viscous pressure
• Fuzzy Sphere Dynamics and Non-Abelian DBI in Curved Backgrounds
• Formation of caustics in Dirac-Born-Infeld type scalar field systems
• Backreaction and the rolling tachyon -- an effective action point of view
• $K$-field kinks: stability, exact solutions and new features
• D-brane Dynamics and Creations of Open and Closed Strings after Recommbination
• Cosmological perturbations in $k$-essence model
• On the lagrangian description of dissipative systems
• Observational constraints on assisted k-inflation
• Inflationary attractor in Gauss-Bonnet brane cosmology
• Observed galaxy power spectrum in cubic Galileon model
• Interaction between Generalized Varying Chaplygin gas and Tachyonic Fluid
• The Schrödinger Wave Functional and S-branes
• Forecast constraints on Anisotropic Stress in Dark Energy using gravitational-waves
• Gauge-invariant observables and marginal deformations in open string field theory
• Tachyon inflation in the Large-$N$ formalism
• Brane-like singularities with no brane
• Renormalization Group Approach to $c=1$ Matrix Model on a circle and D-brane Decay
• A new class of holographic dark energy models in LRS Bianchi Type-I
• A Comment on Continuous Spin Representations of the Poincaré Group and Perturbative String Theory
• Coulomb's law corrections and fermion field localization in a tachyonic de Sitter thick braneworld
• Non-tachyonic Scherk-Schwarz compactifications, cosmology and moduli stabilization
• Dynamics of D1-brane in I-brane Background
• Off-Shell Interactions for Closed-String Tachyons
• Possible dark energy imprints in gravitational wave spectrum of mixed neutron-dark-energy stars
• On localization of universal scalar fields in a tachyonic de Sitter thick braneworld
• Timelike Boundary Sine-Gordon Theory and Two-Component Plasma
• Critical Boundary Sine-Gordon Revisited
• Mutually interacting Tachyon dark energy with variable $G$ and $\Lambda$
• The BICEP2 data and a single Higgs-like interacting tachyonic field
• Theoretical and observational constraints on Tachyon Inflation
• Adding a Brane to the Brane-Anti-Brane Action in BSFT
• Dynamical system analysis of Dirac-Born-Infeld scalar field cosmology in coincident $f(Q)$ gravity
• Tachyon warm inflationary universe model in the weak dissipative regime
• Geometrical Tachyon Dynamics in the Background of a Bulk Tachyon Field
• Tachyonic open inflationary universes
• Note About Non-BPS and BPS Dp-branes in Near Horizon Region of N Dk-Branes
• Noncommutativity and Tachyon Condensation
• The Final Fate of the Rolling Tachyon
• Dynamics of Polynomial Chaplygin Gas Warm Inflation
• A de Sitter tachyonic braneworld revisited
• The Decay of Unstable Noncommutative Solitons
• N-point functions in rolling tachyon background
• D-branes in 2d Lorentzian black hole
• Reheating in tachyonic inflationary models: Effects on the large scale curvature perturbations
• Exact solutions for Bianchi type cosmological metrics, Weyl orbits of E_{8(8)} subalgebras and p--branes
• Unification of cosmological scalar fields
• Interacting tachyonic scalar field
• Closed String Emission from Unstable D-brane with Background Electric Field
• Note on D-Brane Effective Action in the Linear Dilaton Background
• Brane tachyon dynamics
• The Mass, Normalization and Late Time behavior of the Tachyon Field
• Gravitational collapse with tachyon field and barotropic fluid
• Remarks on the rolling tachyon BCFT
• Combined cosmological tests of a bivalent tachyonic dark energy scalar field model
• Brane - Antibrane as a Defect of Tachyon Condensation
• Matrix Model and Time-like Linear Dilaton Matter
• M-Theory Moduli Space and Cosmology
• Complex Scalar Field Reheating and Primordial Black Hole production
• Impact of generalized dissipative coefficient on warm inflationary dynamics in the light of latest Planck data
• Supertube Dynamics in Diverse Backgrounds
• ZZ Instantons and the Non-Perturbative Dual of c = 1 String Theory
• Solar System Constraints on Scalar Tensor Theories with Non-Standard Action
• Correlators of Matrix Models on Homogeneous Spaces
• LREE of an Unstable Dressed-Dynamical D$p$-brane: Superstring Calculations
• Light-like tachyon condensation in Open String Field Theory
• Holographic dark energy with time varying $c^2$ parameter
• Interacting Tachyon: generic cosmological evolution for a tachyon and a scalar field
• (A)symmetric Tachyon Rolling in de Sitter Spacetime: A universe devoid of Planck density
• Matrix Models and 2D String Theory
• A Thermodynamic Interpretation of Time for Superstring Rolling Tachyons
• Cosmological Scaling Solutions with Tachyon:Modified Gravity Model
• Assisted Inflation from Geometric Tachyon
• Non-abelian expansion of S-matrix elements and non-abelian tachyon DBI action
• A Quintessentially Geometric Model
• Interacting entropy-corrected holographic scalar field models in non-flat universe
• Inclusive Constraints on Unified Dark Matter Models from Future Large-Scale Surveys
• Logamediate Inflation by Tachyon Field
• Noether Symmetry Approach for Dirac-Born-Infeld Cosmology
• Non-local scalar fields in static spacetimes via heat kernels
• Implications of Rastall Theory on Stellar Solutions admitting Vanishing Complexity: A New Perspective
• Infrared finite semi-inclusive cross section in two dimensional type 0B string theory
• Reheating constraints on K-inflation
• Covariant open bosonic string field theory on multiple D-branes in the proper-time gauge
• On D-brane-Anti D-brane Effective actions and their all order Bulk Singularity Structures
• Approach to exact solutions of cosmological perturbations: Tachyon field inflation
• Closed String Tachyon: Inflation and Cosmological Collapse
• A Modified Generalized Chaplygin Gas as the Unified Dark Matter-Dark Energy Revisited
• The $k$-essence scalar field in the context of Supernova Ia Observations
• Perturbative stability of SFT-based cosmological models
• Evolution of Spherical Overdensity in Thawing Dark energy Models
• Anti-de Sitter D-branes in Curved Backgrounds
• One-loop Evolution of a Rolling Tachyon
• Multibranes boundary states with open string interactions
• Tachyon condensation and `bounce' in the D1-D5 system
• Supergravity Approach to Tachyon Potential in Brane-Antibrane Systems
• Unitarity Meets Channel-Duality for Rolling / Decaying D-Branes
• Dissipative Unified Dark Fluid Model
• Estimating Temperature Fluctuations in the Early Universe
• Confinement and screening in tachyonic matter
• Boundary String Field Theory as a Field Theory -- Mass Spectrum and Interaction
• Cosmology and perturbations in tachyonic massive gravity
• Tadpole Cancellation in Unoriented Liouville Theory
• S-brane solutions in gauged and ungauged supergravities
• Holographic dilatonic model of dark energy
• Notes on D-branes in 2D Type 0 String Theory
• Moduli Space of Unstable D-branes on a Circle of Critical Radius
• Towards SDp-brane Quantization
• The Schrodinger Wave Functional and Closed String Rolling Tachyon
• Energy Quantisation in Bulk Bouncing Tachyon
• Rolling Tachyon with Electromagnetic Field in Linear Dilaton Background
• Cosmological Analysis of Modified Holographic Ricci Dark Energy in Chern-Simons Modified Gravity
• Scalar field potentials for closed and open cosmological models
• Closed inflationary universe with tachyonic field
• Weyl Card Diagrams
• Geometric Tachyon to Universal Open String Tachyon
• D-Brane solutions in a light-like linear dilaton background
• Cosmological and astrophysical constraints on tachyon dark energy models
• A Comparison of Quintessence and Nonlinear Born-Infeld Scalar Field Using Gold Supernova data
• Tachyon model of Tsallis holographic dark energy
• Back to the origins of brane-antibrane inflation
• Dissipative quintessence, and its cosmological implications
• Weyl Card Diagrams and New S-brane Solutions of Gravity
• Tsallis holographic dark energy under Complex form of Quintessence model
• Tubular Solutions in NS5-brane, Dp-brane and Macroscopic Strings Backgrounds
• Rolling Near the Tachyon Vacuum
• Thermal Partition Functions for S-branes
• Absorption Cross-Section and Decay Rate of Dilatonic Black Strings
• Inflationary Attractor in Braneworld Scenario
• Polytropic gas scalar field models of dark energy
• The CST Bounce Universe model -- a parametric study
• Stability of a tachyon braneworld
• String Theory on Lorentzian AdS_3 in Minisuperspace
• Interacting viscous entropy-corrected holographic scalar field models of dark energy with time-varying G in modified FRW cosmology
• Tachyonic matter cosmology with exponential and hyperbolic potentials
• Tachyon field in loop quantum cosmology: An example of traversable singularity
• Brane Decay and Death of Open Strings
• Testing a dissipative kinetic k-essence model
• Renormalization group flows and continual Lie algebras
• Tachyon Kinks in Boundary String Field Theory
• Tachyon-Dilaton-induced Inflation as an alpha'-resummed String Background
• Clustering of Superstring Loops
• Tachyon Vortex
• Holographic field theory models of dark energy in interaction with dark matter
• Tachyon potentials from a supersymmetric FRW model
• Rolling tachyon and the Phase Space of Open String Field Theory
• BPS D-branes from an Unstable D-brane in a Curved Background
• Constraining Thawing Dark Energy using Galaxy Cluster Number Counts
• Proposal for the Open String Tachyon Effective Action in the Linear Dilaton Background
• Perturbations in Tachyon Dark Energy and their Effect on Matter Clustering
• Delocalized, non-SUSY $p$-branes, tachyon condensation and tachyon matter
• Tachyonic (phantom) power-law cosmology
• Time-Symmetric Rolling Tachyon Profile
• Applications of Thirring Model to Inhomogenous Rolling Tachyon and Dissipative Quantum Mechanics
• Delays in Open String Field Theory
• BPS Wilson loops in Minkowski spacetime and Euclidean space
• WMAP Constraints On K-Inflation
• Closed String Field Theory with Dynamical D-brane
• Inflation in anisotropic brane universe using tachyon field
• Dark Energy and Tachyon Field in Bianchi Type-V Space-time
• Disk Partition Function and Oscillatory Rolling Tachyons
• Time-localized projectors in String Field Theory with E-field
• Late-time-accelerated expansion arisen from gauge fields in an anisotropic background and a fruitful trick for Noether's approach
• More on Tachyon Cosmology in De Sitter Gravity
• Primordial Gravitational Waves Spectrum in the Coupled-Scalar-Tachyon Bounce Universe
• Correlators in Timelike Bulk Liouville Theory
• Phenomenology analysis of duration inflation for Tachyon field in loop quantum cosmology
• Generalized second law of thermodynamics in presence of interacting tachyonic field and scalar(phantom)field
• Tachyon warm inflation with the effects of Loop Quantum Cosmology in the light of Planck 2015
• Higher derivative corrections to Wess-Zumino action of Brane-Antibrane systems
• Mirage cosmology with an unstable probe D3-brane
• Electrostatics approach to closed string pair production from a decaying D-brane
• Anisotropic Dark Energy and the Generalized Second Law of Thermodynamics
• Classical and quantum Big Brake cosmology for scalar field and tachyonic models
• A cosmological model describing the early inflation, the intermediate decelerating expansion, and the late accelerating expansion by a quadratic equation of state
• Scalar field inflation and Shan-Chen fluid models
• Thermodynamical description of modified generalized Chaplygin gas model of dark energy
• S-matrix elements and covariant tachyon action in type 0 theory
• Holographic Naturalness
• Tachyonic vs Quintessence dark energy: linear perturbations and CMB data
• Scalar Dark Energy Models and Scalar-Tensor Gravity: Theoretical Explanations for the Accelerated Expansion of Present Universe
• Tachyon Logamediate inflation on the brane
• Warm Modified Chaplygin Gas Shaft Inflation
• Constraining Parameters of Generalized Cosmic Chaplygin Gas in Loop Quantum Cosmology
• Galactic Halos and Black Holes in Non-Canonical Scalar Field Theories
• Non-SUSY $p$-branes delocalized in two directions, tachyon condensation and T-duality
• Tachyons in Compact Spaces
• On Tachyon condensation and open-closed duality in the c=1 string theory
• A Tutorial on Links between Cosmic String Theory and Superstring Theory
• Klein factors and Fermi-Bose Equivalence
• Cosmological Dynamics in Interacting Scalar-Torsion f(T,$\varphi$) Gravity: Investigating Energy and Momentum Couplings
• Towards the entropy of gravity time-dependent models via the Cardy-Verlinde formula
• Travelling Front of a Decaying Brane in String Field Theory
• Noncritical osp(1|2,R) M-theory matrix model with an arbitrary time dependent cosmological constant
• Duality linking standard and tachyon scalar field cosmologies
• Black Hole - String Transition and Rolling D-brane
• c=1 Boundary Conformal Field Theory Revisited
• Singularity crossing, transformation of matter properties and the problem of parametrization in field theories
• Inhomogeneous tachyon dynamics and the zipper
• Lorentzian wormholes supported by tachyon matter
• Tachyon field non-minimally coupled to massive neutrino matter
• Inhomogeneous tachyon condensation
• The energy-momentum tensor of perturbed tachyon matter
• Highly Symmetric D-brane-Anti-D-brane Effective Actions
• Note About Unstable M3-brane Action
• Quantum complexity and bulk timelike singularities
• Conformal Bootstrap in dS/CFT and Topological Quantum Gravity
• Boundary states in the Nappi-Witten model
• Generalized phenomenological models of dark energy
• Study of Thermodynamics in Generalized Holographic and Ricci Dark Energy Models
• On effective actions of non-BPS branes and their higher derivative corrections
• Reheating a multi-throat universe by brane motion
• Membrane in M5-branes Background
• Supersymmetric Kaluza-Klein reductions of M2 and M5-branes
• Predictions of Dynamically Emerging Brane Inflation Models
• D-brane dynamics in a plane wave background
• Note on Light-like Tachyon Condensation
• Non Abelian Geometrical Tachyon
• Future soft singularities, Born-Infeld-like fields and particles
• Rolling tachyon in anti-de Sitter space-time
• Long-wavelength non-linear perturbations of a complex scalar field
• Moving Branes in Presence of the Background Tachyon Fields
• Evolution of Tachyon Kink with Electric Field
• AdS/CFT description of D-particle decay
• Quantum Cosmology and Tachyons
• Fundamental strings in SFT
• Evolution of Dark Energy Perturbations for Slotheon Field and Power Spectrum
• Finite Temperature Systems of Brane-Antibrane on a Torus
• D-Brane Effective Actions and Particle Production near the Beginning of the Tachyon Condensation
• Role of Tachyonic Field in Accelerating Universe in Presence of Perfect Fluid
• Regular Friedmann Universes and Matter Transformations
• Reconstruction of a kinetic k--essence Lagrangian from a modified of dark energy equation of state
• Left/right entanglement and thermalization of time dependent plane wave Green-Schwarz superstring
• Dynamical System Analysis for Scalar Field Potential in Teleparallel Gravity
• Graviton production from D-string recombination and annihilation
• Generalized Ghost Pilgrim Dark Energy Fractal Cosmology with Observational Constraint
• Tachyon Condensation, Open-Closed Duality, Resolvents, and Minimal Bosonic and Type 0 Strings
• Rolling tachyons for separated brane-antibrane systems
• Strings from geometric tachyon in Rindler space and black hole thermodynamics
• Symplectic structure in open string field theory I: Rolling tachyons
• Symplectic structure in open string field theory II: Sliding lump
• Homogeneous Rolling Tachyons in Boundary String Field Theory
• Spinflation from Geometric Tachyon
• Covariant phase space and $L_{\infty }$ algebras
• Closed String Radiation from the Interacting Fractional-Dressed D$p$-Branes with the Transverse Motions
• M-Theory Solutions in Multiple Signatures from E_11
• Viscous interacting and stability on dark matter Bose-Einstein condensation with modified Chaplygin gas
• Reheating and Cosmic String Production
• D-branes in overcritical electric fields
• Anti-de Sitter D-brane dynamics
• Gravitational Dual of Tachyon Condensation
• K-Inflation in Noncommutative Space-Time
• Bouncing cosmological model with general relativistic hydrodynamics in extended gravity
• On the Production of Open Strings from Brane Anti-Brane Annihilation
• Mirage resolution of cosmological singularities
• Cosmological dynamics of D-cceleration
• The Fate of Massive F-Strings
• On the effective action of a space-like brane
• Imaginary time D-branes to all orders
• Possible black universes in a brane world
• Quantum Cosmology Aspects Of D3 Branes and Tachyon Dynamics
• ZZ Brane Decay in D Dimensions
• All-Order Quartic Couplings in Highly Symmetric D-brane-Anti-D-brane Systems
• Conformally de Sitter space from anisotropic SD3-brane of type IIB string theory
• Metamaterial model of tachyonic dark energy
• All Order ${\alpha }^{\prime }$ Corrections to Fermionic Couplings of D-brane-Anti-D-brane Effective Actions
• Space-like Dp branes: accelerating cosmologies versus conformally de Sitter space-time
• Power spectra in extended tachyon cosmologies
• (1+1)-Dirac bound states in one-dimension; position-dependent Fermi velocity and mass
• On gravity localization in scalar braneworlds with a super-exponential warp factor
• Non linear equation of state and effective phantom divide in brane models
• Tachyonic crystals and the laminar instability of the perturbative vacuum in asymptotically free gauge theories
• Bosonic D-brane Effective Action in Linear Dilaton Background
• Particle Motion Around Tachyon Monopole
• Resolving Puzzles of Massive Gravity with and without violation of Lorentz symmetry
• Quantum rolling tachyon
• Quintessence and tachyon dark energy in interaction with dark matter: Observational constraints and model selection
• Bouncing universe and non-BPS branes
• A note on Tachyon dynamics
• Confinement of fermions in tachyon matter
• Alpha-prime corrections to space-like branes
• Twinlike models for parametrized dark energy
• Proper acceleration, geometric tachyon and dynamics of a fundamental string near D$p$ branes
• Observational constraints on the massive neutrinos induced late-time cosmic acceleration
• Chaplygin Gas of Tachyon Nature Imposed by Symmetry and Constrained via H(z) Data
• Extended tachyon field using form invariance symmetry
• The Red Queen visits Minkowski Space
• Non-Affine Extensions of the Raychaudhuri Equation in the K-essence Framework
• Holographic dynamics of unstable branes in AdS
• Defect Formation with Bulk Fields
• High-energy asymptotics of D-brane decay amplitudes from Coulomb gas electrostatics
• Reconstructing cosmic evolution with a density parametrization
• Tachyon Effective Dynamics and de Sitter Vacua
• Particle Production in Tachyon Condensation
• Interaction between Tachyon and Hessence (or Hantom) dark energies
• Quons in a Quantum Dissipative System
• Visible, invisible and trapped ghosts as sources of wormholes and black universes
• Tachyon field theory description of (thermo)dynamics in dS space
• On non-homogeneous tachyon condensation in closed string theory
• On Special Limit of Non-Supersymmetric Effective Actions of type II String theory
• D-brane orbiting NS5-branes
• On the origin of thermal string gas
• Tachyon condensation at one loop
• Constant-roll inflation with tachyon field in the holographic braneworld
• Symplectic structure in open string field theory III: Electric field
• Observational constraints on thawing quintessence scalar field model
• Tachyon condensation in unbalanced D-anti D system
• Varying Alpha Generalized Dirac-Born-Infeld Models
• Brane with Transverse Rotation and Background Fields: Boundary State and Tachyon Condensation
• Late Time Behaviors of an Inhomogeneous Rolling Tachyon
• The Rolling Tachyon Boundary Conformal Field Theory on an Orbifold
• Mirage Cosmology of U(1) Gauge Field on Unstable D3 Brane Universe
• Cosmological constraints on a dark energy model with a non-linear scalar field
• Tachyon Couplings to Fermion
• Interacting dark fluid in the universe bounded by event horizon : A non-equilibrium prescription
• A Matter with an effective EoS interacting with a tachynic field in an accelerating Universe
• Propagation Constraints and Classical Solutions in K-essence Like Theories
• Exact solutions in the Dirac-Born-Infeld effective theory and the fate of tachyon
• An exotic k-essence interpretation of interactive cosmological models
• Interacting Quintessence and Growth of Structure
• Dynamical analysis of Brans-Dicke Universe with inverse power-law effective potential
• Non-BPS D9-branes in the Early Universe
• Non-commutative Dp-Brane in General Background Fields
• Modified scaling in $k$-essence model in interacting dark energy - dark matter scenario
• Negative-Tension Branes and Tensionless 1/2 Brane in Boundary Conformal Field Theory
• Thermodynamics of irreversible particle creation phenomena and its cosmological consequence
• How to Stop (Worrying and Love) the Bubble: Boundary Changing Solutions
• String theory: an update
• A Gravity Dual of Localized Tachyon Condensation in Intersecting Branes
• Towards the unification of late-time acceleration and inflation by k-essence model
• Following the density perturbations through a bounce with AdS/CFT Correspondence
• Anisotropic SD2 brane: accelerating cosmology and Kasner-like space-time from compactification
• Interacting tachyon with varying mass dark matter
• Interaction of Moving Branes with Background Massless and Tachyon Fields in Superstring Theory
• Again About Singularity Crossing In Gravitation And Cosmology
• Fractional S-branes on a Spacetime Orbifold
• Moving Branes with Background Massless and Tachyon Fields in the Compact Spacetime
• (P)reheating Effects of the Kähler Moduli Inflation I Model
• Logamediate inflation in DGP cosmology driven by a non-canonical scalar field
• Boundary timelike Liouville theory: bulk 1-point & boundary 2-point functions
• Complete factorization of equations of motion for generalized scalar field theories
• Bogomol'nyi equations for Dirac-Born-Infeld cosmic string
• Imaginary Sources: Completeness Conjecture and Charges
• Flavored extended instanton in QCD
• Confinement of Fermions in Tachyon Matter at Finite Temperature
• Criticality and Big Brake singularities in the tachyonic evolutions of closed Friedmann universes with cold dark matter
• Condensation de tachyon dans le système brane-antibrane
• Evolution of the equation of state parameters of cosmological tachyonic field components through mutual interaction
• Time-dependent Backgrounds in String Theory and Dualities
• Fundamental String (Membrane) Orbiting D5(M5)-branes
• Pair Creation of Open Strings between the Unstable-Dressed D$p$-branes
• Holographic dark energy models with Interactions and entropy corrections for different cutoffs in the Brans-Dicke cosmology
• DUCA: Dynamic Universe Cosmological Analysis. II. The impact of clustering dark energy on the halo mass function
• A speed limit on tachyon fields from cosmological and fine-structure data
• Phase space analysis and cosmography of a two-fluid cosmological model
• Kinetically stabilized inflation
• Proposal for D0-brane anti-D0-brane Action
• Strings as sigma models and in the tensionless limit
• A Note on Tachyon Moduli and Closed Strings
• Some New Light-cone Time Dependent Solutions in Deformed pp-wave Backgrounds
• Fractional Dp-Branes with Transverse and Tangential Dynamics in the Presence of Background Fluxes
• Parametrization of Born-Infeld Type Phantom Dark Energy Model
• Tachyonic quench in a free bosonic field theory
• Interaction of the branes in the Presence of the Background Fields: the Dynamical Non-intersecting Perpendicular Wrapped-Fractional Configuration
• Dissolving D0-brane into D2-brane with background B-field
• Boundary Scattering in 1+1 Dimensions as an Aharanov-Bohm Effect
• $U(1)$ Chiral Symmetry in One-Dimensional Interacting Electron System with Spin
• Cosmic evolution of scalar fields with multiple vacua: generalized DBI and quintessence
• On the effective action of D-brane-anti-D-brane system
• BPS pp-wave brane cosmological solutions in string theory
• Higher Spins as Rolling Tachyons in Open String Field Theory
• A Note on Strings in a Rindler Background
• Perturbations In Some Dark Energy Models