3 edition of **Evolution of cosmic string networks** found in the catalog.

Evolution of cosmic string networks

- 256 Want to read
- 12 Currently reading

Published
**1989**
by Fermi National Accelerator Laboratory in Batavia, IL
.

Written in English

- String models.

**Edition Notes**

Statement | c Andreas Albrecht and Neil Turok. |

Series | Fermilab pub -- 89/42-A., NASA contractor report -- NASA CR-182836. |

Contributions | Turok, Neil., Fermi National Accelerator Laboratory., United States. National Aeronautics and Space Administration. |

The Physical Object | |
---|---|

Format | Microform |

Pagination | 1 v. |

ID Numbers | |

Open Library | OL15393413M |

I discuss the differences between cosmic superstrings and their solitonic analogues, I review our current understanding about the evolution of cosmic superstring networks, and I then briefly describe the variety of observational consequences, which may help us to get an insight into the stringy description of our Universe. 1. In this letter we review recent work on the cosmological evolution of such string networks. Focusing on analytic velocity-dependent evolution models, we discuss the phenomenology of cosmic (super)string networks and obtain constraints for brane-inflation models. Export citation and abstract BibTeX RIS.

4. Evolution of the cosmic string network. To see the impact of the extra dimensions on the cosmic string network evolution, let us use the simple one-scale model for the evolution of the cosmic string network. The energy in the cosmic strings is much smaller than the energy in the radiation (or in the matter at later time). The evolution of a cosmic-string network is examined in terms of two length scales: {xi}, related to the long-string density, and {bar {xi}}, the persistence length along the left- or right-moving string, respectively. Previous work is extended by allowing for the dependence of some of the parameters on these scales.

The evolution of cosmic string networks is an interesting dynamical problem. The equations governing these networks are classical and fully specified, but the length scale at which cosmic string loops form has been uncertain to tens of orders of magnitude. Stack Exchange network consists of Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Visit Stack Exchange.

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Get this from a library. Evolution of cosmic string networks. [Andreas Johann Albrecht; Neil Turok; Fermi National Accelerator Laboratory.; United States. National Aeronautics and. Get this from a library. Evolution of cosmic string networks. [Andreas Johann Albrecht; Neil Turok; United States.

National Aeronautics and Space. A simple model for the evolution of the string network is presented, and related to the statistical mechanics of string networks. The model predicts the long string density throughout the.

~Received 24 July ; published 19 February. We describe a numerical simulation of the evolution of an S 3 cosmic string network which takes fully into account the noncommutative nature of the cosmic string ﬂuxes and the topological obstructions Evolution of cosmic string networks book hinder strings from moving past each other or intercommuting.

The present understanding of the scale-invariant evolution of a cosmic string network is reviewed. After a brief introduction to string properties and their nonlinear interactions, we discuss the replacement of the full three-dimensional field theory with a one-dimensional low-energy effective action—the Nambu by: 1.

Results on cosmic strings are summarized including: (1) the application of non-equilibrium statistical mechanics to cosmic string evolution; (2) a simple one scale model for the long strings which has a great deal of predictive power; (3) results from large scale numerical simulations; and (4) a discussion of the observational consequences of our results.

An upper. The evolution of a system of cosmic strings is studied using an extended version of an analytic formalism introduced by Kibble. The evolution of interacting F- and D-string networks is discussed in Section VIII. Our conclusions are summarized and discussed in Section IX. During the completion of this work, we became aware of an independent work by.

J. Correia, C. Martins Quantitative studies of the evolution and cosmological consequences of networks of cosmic strings (or other topological defects) require a combination of numerical simulations and analytic modeling with the velocity-dependent one-scale (VOS) model.

Eric Chaisson's book Cosmic Evolution takes a grand look at the nature of change in our universe. It proposes a universal theory of change, whereby Darwin's theory of natural selection is expanded to encompass all of physical change.

Despite the woo-woo sounding title, the book takes a relatively rigorous look at how physical laws influence /5(9). A simple model for the evolution of the string network is presented, and related to the statistical mechanics of string networks. The model predicts the long string density throughout the history of the universe from a single parameter, which researchers calculate in radiation era simulations.

We derive the equations governing the dynamics of cosmic strings in a flat anisotropic universe of Bianchi type I and study the evolution of simple cosmic. On the other hand, a semilocal network is made of string segments, each of which will have a length l s and velocity v s.

4 In principle, the evolution of closed string segments (e.g. loops) is well-known for standard topological strings. In the semilocal case, there is an additional dynamical mechanism which will affect the evolution of the.

We describe a numerical simulation of the evolution of an S 3 cosmic string network which takes fully into account the non-commutative nature of the cosmic string ﬂuxes and the topological obstructions which hinder strings from moving past each other.

tions [16–18]), while cosmic superstrings have intercom-mutation probabilities which can be much smaller than unity [19,20]. This has an important effect on the cosmo-logical evolution of superstring networks leading to higher number densities than for ordinary field theory cosmic strings [19,21,22].

Physical cosmology is a branch of cosmology concerned with the study of cosmological models. A cosmological model, or simply cosmology, provides a description of the largest-scale structures and dynamics of the universe and allows study of fundamental questions about its origin, structure, evolution, and ultimate fate.

Cosmology as a science originated with the. The velocity-dependent one-scale model of cosmic string network evolution is summarized.

Treating the average string velocity as well as the characteristic lengthscale as dynamical variables, one can obtain a fully quantitative model, describing the complete evolution of a string network, including the prediction of previously unknown transient scaling regimes. Cosmic superstring networks with Y-junctions: Evolution, B-modes and Gravitational waves Article (PDF Available) in Journal of Physics Conference Series (1) October with 28.

cosmology the origin and evolution of cosmic structure Posted By Jir. Akagawa Library TEXT ID Online PDF Ebook Epub Library universe began to take shape as objects galaxies stars planets coalesced from the elemental raw material cosmology is the study of the origin and fate of the universe as a.

Multiple inflation, cosmic string networks and the string landscape To cite this article: Clifford P. Burgess et al JHEP05() View the article online for updates and enhancements.

Related content Balloons hold the key to inflation David Featonby-A simple model for the evolution of a non-Abelian cosmic string network G.

Cella and M. Pieroni. The evolution of the generated cosmic string networks is then studied for different values for the number of generators for the topological defects. Scaling solution appears to be approached in most cases and we present an argument to justify the lack of scaling for the residual cases.Abstract: This lecture reviews the formation of cosmic strings, the evolution of the cosmic string network, and the behavior of free loops.

Also explored is the theory that cosmic string loops are the seeds for galaxy formation.The evolution of a cosmic string network and its scaling behaviour is mentioned in the nal section of chapter 5. The thesis concludes with the contem-porary status of observational evidence of the cosmic strings, including possible discoveries and recommended directions for future research.