Velocity-Dependent Models for Non-Abelian/Entangled String Networks

Abstract

We develop velocity-dependent models describing the evolution of string networks that involve several types of interacting strings, each with a different tension. These incorporate the formation of Y-type junctions with links stretching between colliding strings, while always ensuring energy conservation. These models can be used to describe network evolution for non-abelian strings as well as cosmic superstrings. The application to $Z_N$ strings in which interactions are topologically constrained, demonstrates that a scaling regime is generally reached which involves a hierarchy of string densities with the lightest most abundant. We also study hybrid networks of cosmic superstrings, where energetic considerations are more important in determining interaction outcomes. We again find that networks tend towards scaling, with the three lightest network components being dominant and having comparable number densities, while the heavier string states are suppressed. A more quantitative analysis depends on the precise calculation of the string interaction matrix using the underlying string or field theory. Nevertheless, these results provide further evidence that the presence of junctions in a string network does not obstruct scaling.

44 pages, 15 figures; v2: Discussion on energy conservation and non-elasticity added (section IIIA1), bibliography expanded, published version; v3: typos in string density equations corrected (cf erratum)

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Cited by in corpus (48)

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• Stochastic Gravitational Wave Background generated by Cosmic String Networks: Velocity-Dependent One-Scale model versus Scale-Invariant Evolution
• Evolution of cosmic superstring networks: a numerical simulation
• Cosmic strings and their induced non-Gaussianities in the cosmic microwave background
• Probing Cosmic Superstrings with Gravitational Waves
• Unveiling the Dynamics of the Universe
• Gravitational wave signatures from kink proliferation on cosmic (super-) strings
• Cosmic strings from pure Yang-Mills theory
• Scaling configurations of cosmic superstring networks and their cosmological implications
• Cosmic Superstrings
• Constraints on the fundamental string coupling from B-mode experiments
• The cosmological evolution of p-brane networks
• Cosmic F- and D-strings from pure Yang-Mills theory
• The effect of kinematic constraints on multi-tension string network evolution
• Proliferation of sharp kinks on cosmic (super-)string loops with junctions
• Lensing and CMB Anisotropies by Cosmic Strings at a Junction
• Cosmic string evolution with a conserved charge
• Scaling laws for weakly interacting cosmic (super)string and p-brane networks
• Gravitational Radiation by Cosmic Strings in a Junction
• Fast Analytic Computation of Cosmic String Power Spectra
• Survival of pq-superstrings in field theory simulations
• Semianalytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings
• Evolution of Semilocal String Networks: I. Large-scale Properties
• Measuring Global Monopole Velocities, one by one
• Zipping and Unzipping of Cosmic String Loops in Collision
• CMB anisotropies generated by cosmic string loops
• Gravitating (field theoretical) cosmic (p,q)-superstrings
• Instability of Higgs Vacuum via String Cloud
• Evolution of Cosmic Necklaces and Lattices
• Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
• Dynamics of junctions and the multi-tension velocity-dependent one-scale model
• Detection of cosmic superstrings by geodesic test particle motion
• Gravitational power from cosmic string loops with many kinks
• Evolution of Semilocal String Networks: II. Velocity estimators
• Gravitational waves from cosmic superstrings and gauge strings
• Revisit of Y-junctions for strings with currents: transonic elastic case
• Gravitational wave spectrum from kinks on infinite cosmic superstrings with Y-junctions
• Cosmic superstring trajectories in warped compactifications
• Cosmic superstrings in large volume compactifications: PTAs, LISA and time-varying tension
• Cosmic Strings Collision in Cosmological Backgrounds
• Stability of superconducting strings coupled to cosmic strings
• Scaling properties of multitension domain wall networks
• Measuring CMB non-Gaussianity as a probe of Inflation and Cosmic Strings
• A simple model for the evolution of a non-Abelian cosmic string network