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Tuesday, July 21, 2020 | History

3 edition of Cosmological structure formation from soft topological defects found in the catalog.

Cosmological structure formation from soft topological defects

C. T. Hill

Cosmological structure formation from soft topological defects

by C. T. Hill

  • 49 Want to read
  • 18 Currently reading

Published by Fermi National Accelerator Laboratory, National Aeronautics and Space Administration, National Technical Information Service, distributor in Batavia, IL, [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Cosmology.,
  • Structures.,
  • Topology.,
  • Universe.

  • Edition Notes

    StatementChristopher T. Hill, David N. Schramm, J.N. Fry.
    SeriesNASA contractor report -- NASA CR-183371., FERMILAB-pub -- 88/120-A., Fermilab pub -- 88/120-A.
    ContributionsSchramm, David N., Fry, J. N., Fermi National Accelerator Laboratory., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15407644M

    In supersymmetric theories, topological defects can have nontrivial behaviors determined purely by whether or not supersymmetry is restored in the defect core. A well-known example of this is that some supersymmetric cosmic strings are automatically superconducting, leading to important cosmological effects and constraints. From the vantagepoint of the four-dimensional topological theory, these defects are surface operators. Specific intersection points of these defects lead to Yukawa couplings. A distinctive signature of this structure formation scenario would be a slight blue tilt of the spectrum of gravitational waves. This book is a product of a month.

    The International Conference "Primordial Nucleosynthesis and Evolution of Early Universe" was held in the presence of Prof. William Fowler on 4 - 8 September at the Sanjo Conference Hall, the University of Tokyo. This conference was co-sponsored by IUPAP, the International Union of Pure and. Full text of "Superfluid analogies of cosmological phenomena" See other formats.

    Topological defect structure and dynamics in 3D active nematics. Nematic liquid crystals, which are fluids with orientational order, may contain topological defects called . So do point particles, which can be represented as conical "defects" in space. With a negative cosmological constant, (2+1)-dimensional general relativity even admits black hole solutions, which behave almost like ordinary (3+1)-dimensional black holes.


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Cosmological structure formation from soft topological defects by C. T. Hill Download PDF EPUB FB2

This can generate structure formation at redshifts z greater than or approx 10 on mass scales as large as M approx 10 to the 18th solar masses. Such low energy transitions can lead to large but phenomenologically acceptable density inhomogeneities in soft topological defects (e.g., domain walls) with minimal variations in the microwave Cited by: Get this from a library.

Cosmological structure formation from soft topological defects. [C T Hill; David N Schramm; J N Fry; Fermi National Accelerator Laboratory.; United States.

National Aeronautics and Space Administration.]. Cosmic Structure Formation with Topological Defects Article in Physics Reports (1) June with 33 Reads How we measure 'reads'.

Besides the formation of structure in the universe, topological defects may be relevant for the baryon number asymmetry of the universe. Superconducting cosmic strings [] or vortons [20] might produce the high-energy cosmic rays [15], or even gamma ray bursts [12], [13].Cited by: In Section 5 we investigate numerical results for structure formation from topological defects.

After a brief introduction to the simulation algorithms, we mainly Cosmological structure formation from soft topological defects book CMB anisotropies and large scale structure power spectra, and we draw some conclusions. Symmetry Cited by: As reviewed in this lecture, topological defect models of structure formation generically produce such a spectrum.

We give a summary of the cosmic string and global texture models, focusing on distinct observational signatures in large-scale structure surveys and in the microwave background. Abstract. It is shown that the potential galaxy formation and large-scale structure problems of (1) objects existing at high redshifts (Z ⋧ 5), (2) structures existing on scales of Mpc as well as velocity flows on such scales, and (3) minimal microwave anisotropies \(\frac{{\Delta T}}{T} \lesssim {10^{ - 5}} \) can be solved if the seeds needed to generate structure form in a vacuum Cited by: 7.

Cosmic Defects and Cosmology. A very heuristic account of structure formation with defects is then provided, following which we introduce the tool box required for high precision calculations. This can generate structure formation at redshifts z ≳ 10 on mass scales as large as M ˜ 10 1M M Such low energy transitions can lead to large but phenomenologically acceptable density inhomogeneities in “soft topological defects” (e.g., domain walls) with minimal variations in the microwave anisotropy, as small as δT/T ≲ 10−6.

This. Christopher T. Hill (born J ) is an American theoretical physicist at the Fermi National Accelerator Laboratory who did undergraduate work in physics at M.I.T.

(B.S., M.S., ), and graduate work at Caltech (Ph.D.,Murray Gell-Mann).Hill's Ph.D. thesis, "Higgs Scalars and the Nonleptonic Weak Interactions" () contains the first discussion of the two-Higgs-doublet model.

Publications "Gate field effects on the topological insulator BiSbTeSe 2 interface", S. Liu, Y.-P. Wang, Y. Chen, J. Fry, and H.-P. Cheng, Appl. Phys. Lett.

The standard model involves particle symmetry and the mechanism of its breaking. Modern cosmology is based on inflationary models with baryosynthesis and dark matter/energy, which involves physics beyond the standard model. Studies of the physical basis of modern cosmology combine direct searches for new physics at accelerators with its indirect non-accelerator probes, in which cosmological Cited by: 9.

/ A.S. Szalay and D.N. Schramm --Cosmological Structure Formation from Soft Topological Defects / C.T. Hill, D.N. Schramm and J.N. Fry --Testing for the Gaussian Nature of Cosmological Density Perturbations through the Three-Point Temperature Correlation Function / X.

Luo and D.N. Schramm --Strings and the Origins of Galaxies / N. Turok and D.N. A suspicion shared by some, including the author, is that a satisfactory solution of the cosmological constant problem would shed much light on the puzzle of quantum gravity.

Quantum field theory, vacuum fluctuations, the microscopic degrees of freedom of gravity and their coarse graining all converge to this Pandora’s box in ways that still Author: Gianluca Calcagni. The Big Bang theory is a cosmological model of the observable universe from the earliest known periods through its subsequent large-scale evolution.

The model describes how the universe expanded from an initial state of very high density and high temperature, and offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic. We also consider the cosmological implications of well motivated physical models of the early universe with a particular emphasis on inflation and topological defects.

Astrophysical and cosmological tests over a wide range of scales, from the solar system to the observable horizon, severely restrict the allowed models of the by:   The first third of the book carefully develops the necessary background in general relativity and quantum fields.

The rest of the book then provides self-contained accounts of all the key topics in contemporary cosmology, including inflation, topological defects, gravitational lensing, galaxy formation, large-scale structure and the distance : J. Peacock. This book presents reviews and new findings in the field of the very early universe, where the interests of particle theorists and astrophysicists meet.

Also, WIMP search experiments are reported. Contents: Cold Dark Matter Cosmology: Status and Open Questions (J R Primack) Review of Cosmological Parameters (W L Freedman). Buy Cosmological Physics by J. Peacock from Waterstones today.

Click and Collect from your local Waterstones or get FREE UK delivery on orders over £ A firm prediction of the cold dark matter model of cosmological structure formation is that the Milky Way should host a huge population of self-bound dark matter subhalos.

The vast majority of these subhalos are likely devoid of stars, but a tiny minority are expected to host the luminous dwarf galaxies observed around the Milky Way. This book is devoted to time-resolved optically stimulated luminescence and is suitable for researchers with an interest in the study of point-defects using luminescence methods.

The book first sets the method within the context of the luminescence field at large and then provides an .This course covers the physical fundamentals of material science with an in-depth discussion of structure formation in soft and hard materials and how structure determines material mechanical, electrical, thermal, and optical properties.

Topics include amorphous and crystal structures, defects, dislocation theory, thermodynamics and phase. This book accompanies another book by the same authors, Introduction to the Theory of the Early Universe: Hot Big Bang Theory and presents the theory of the evolution of density perturbations and relic gravity waves, theory of cosmological inflation and post-inflationary reheating.

Written in a pedagogical style, the main chapters give a detailed account of the established theory, with Brand: World Scientific Publishing Company.