Thermodynamics of Cosmic Defect Network Evolution

Abstract

We show that simple thermodynamic conditions determine, to a great extent, the equation of state and dynamics of cosmic defects of arbitrary dimensionality. We use these conditions to provide a more direct derivation of the Velocity-dependent One-Scale (VOS) model for the macroscopic dynamics of topological defects of arbitrary dimensionality in a $N+1$-dimensional homogeneous and isotropic universe. We parameterize the modifications to the VOS model associated to the interaction of the topological defects with other fields, including, in particular, a new dynamical degree of freedom associated to the variation of the mass per unit $p$-area of the defects, and compute the corresponding scaling solutions. The observational impact of this new dynamical degree of freedom is also briefly discussed.

9 pages, no figures

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Cited by in corpus (8)

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• Particle creation and decay in nonminimally coupled models of gravity
• Comparing parametric and non-parametric velocity-dependent one-scale models for domain wall evolution
• Parameter-free velocity-dependent one-scale model for domain walls
• Revisiting the VOS model for monopoles
• Thermodynamics of the Primordial Universe
• Phantom Domain Walls