String Evolution with Friction

  title={String Evolution with Friction},
  author={C. Martins and E. Shellard},
  journal={Physical Review D},
We study the effects of friction on the scaling evolution of string networks in condensed matter and cosmological contexts. We derive a generalized `one-scale' model with the string correlation length $L$ and velocity $v$ as dynamical variables. In non-relativistic systems, we obtain a well-known $L\propto t^{1/2}$ law, showing that loop production is important. For electroweak cosmic strings, we show transient damped epoch scaling with $L\propto t^{5/4}$ (or, in the matter era, $L\propto t^{3… Expand
String theory in the early universe
String theory is a rich and elegant framework which many believe furnishes a UVcomplete unified theory of the fundamental interactions, including gravity. However, if true, it holds at energy scalesExpand
Impact of radiative decay on cosmic string dynamics at small scales
Cosmic strings are topological defects appearing as extended solutions in many high energy physics scenarios. Observation of signatures expected due to the presence of cosmic string networks couldExpand
Cosmic String Evolution in Brane Inflation
There has been notable effort in recent years to obtain inflationary models from string theory. In the most well-studied scenario, brane inflation, the inflationary phase typically ends with a phaseExpand
Detection of Low Tension Cosmic Superstrings
Cosmic superstrings of string theory differ from conventional cosmic strings of field theory. We review how the physical and cosmological properties of the macroscopic string loops influenceExpand
PhD Thesis: String theory in the early universe
The intersection of string theory with cosmology is unavoidable in the early universe, and its exploration may shine light on both fields. In this thesis, three papers at this intersection areExpand
Scaling properties of cosmic (super)string networks
I use a combination of state-of-the-art numerical simulations and analytic modelling to discuss the scaling properties of cosmic defect networks, including superstrings. Particular attention is givenExpand
Cycloops: dark matter or a monopole problem for brane inflation?
We consider cosmic loop production by long string interactions in cosmological models with compact extra dimensions. In the case that the compact manifold is not simply connected, we focus on theExpand
A Tutorial on Links between Cosmic String Theory and Superstring Theory
Cosmic superstrings are introduced to non-experts. First D-branes and $(p,q)$ strings are discussed. Then we explain how tachyon condensation in the early universe may have produced F, D and $(p,q)$Expand
Probing the pre-BBN universe with gravitational waves from cosmic strings
A bstractMany motivated extensions of the Standard Model predict the existence of cosmic strings. Gravitational waves originating from the dynamics of the resulting cosmic string network have theExpand
Accurate Calibration of the Velocity-dependent One-scale Model for Domain Walls
Abstract We study the asymptotic scaling properties of standard domain wall networks in several cosmological epochs. We carry out the largest field theory simulations achieved to date, withExpand