Gauge Fields and Scalars in Rolling Tachyon Backgrounds

Abstract

We investigate the dynamics of gauge and scalar fields on unstable D-branes with rolling tachyons. Assuming an FRW metric on the brane, we find a solution of the tachyon equation of motion which is valid for arbitrary tachyon potentials and scale factors. The equations of motion for a U(1) gauge field and a scalar field in this background are derived. These fields see an effective metric which differs from the original FRW metric. The field equations receive large corrections due to the curvature of the effective metric as well as the time variation of the gauge coupling. The equations of state for these fields resemble those of nonrelativistic matter rather than those of massless particles.

7 pages, uses Revtex4. Revised version, to appear in JHEP

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Cited by in corpus (21)

• Tachyon Dynamics in Open String Theory
• Coupling of Rolling Tachyon to Closed Strings
• Time and Tachyon
• Decay of Unstable D-branes with Electric Field
• Tachyon inflation: tests and comparison with single scalar field inflation
• Open and Closed Strings from Unstable D-branes
• Phantom with Born-Infield type Lagrangian
• Rolling Tachyon with Electric and Magnetic Fields -- T-duality approach -----
• SD-brane gravity fields and rolling tachyons
• On-shell S-matrix and tachyonic effective actions
• Hybrid Inflation and Brane-Antibrane System
• Inhomogeneous tachyon decay, light-cone structure and D-brane network problem in tachyon cosmology
• Rolling of Modulated Tachyon with Gauge Flux and Emergent Fundamental String
• Exact Solutions in Open Bosonic String Field Theory and Marginal Deformation in CFT
• Off-shell extension of S-matrix elements and tachyonic effective actions
• String Fluid, Tachyon Matter, and Domain Walls
• S-matrix elements and off-shell tachyon action with non-abelian gauge symmetry
• Tachyon Field in Cosmology
• Finite Temperature Systems of Brane-Antibrane on a Torus
• Defect Formation with Bulk Fields
• Non-BPS D9-branes in the Early Universe