Primordial fluctuations
Primordial fluctuations are density variations in the early universe which are considered the seeds of all structure in the universe. Currently, the most widely accepted explanation for their origin is in the context of cosmic inflation. According to the inflationary paradigm, the exponential growth of the scale factor during inflation caused quantum fluctuations of the inflaton field to be stretched to macroscopic scales, and, upon leaving the horizon, to "freeze in". At the later stages of radiation- and matter-domination, these fluctuations re-entered the horizon, and thus set the initial conditions for structure formation.
The statistical properties of the primordial fluctuations can be inferred from observations of anisotropies in the cosmic microwave background and from measurements of the distribution of matter, e.g., galaxy redshift surveys. Since the fluctuations are believed to arise from inflation, such measurements can also set constraints on parameters within inflationary theory.

This is an excerpt from the article Primordial fluctuations from the Wikipedia free encyclopedia. A list of authors is available at Wikipedia.
The article Primordial fluctuations at en.wikipedia.org was accessed 770 times in the last 30 days. (as of: 06/11/2013)
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Primordial fluctuations - Wikipedia, the free encyclopedia
Primordial fluctuations are density variations in the early universe which are considered the seeds of all structure in the universe. Currently, the most widely ...
en.wikipedia.org/wiki/Primordial_fluctuations
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Growth of primordial fluctuations - NED
Growth of Primordial fluctuations. ... Then, a primordial energy density fluctuation spectrum must be assumed. One of the most simple hypotheses is the spectrum ...
ned.ipac.caltech.edu/level5/March01/Battaner/node22.html
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Primordial Fluctuations from Inflation with a Triad of Background ...
Mar 5, 2012 ... Abstract: We study the linear perturbation of the recently proposed model of inflation where a uniform gauge-kinetic coupling of the inflaton to ...
arxiv.org/abs/1203.1071
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Pointer states for primordial fluctuations in inflationary cosmology
Oct 24, 2006 ... Abstract: Primordial fluctuations in inflationary cosmology acquire classical properties through decoherence when their wavelengths become ...
arxiv.org/abs/astro-ph/0610700
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Non-Gaussian features of primordial fluctuations in single field ...
Oct 28, 2002 ... We compute the three point correlation functions for primordial scalar and tensor fluctuations in single field inflationary models. We obtain ...
arxiv.org/abs/astro-ph/0210603
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The Nature of Primordial Fluctuations from Anisotropic Inflation
Feb 27, 2010 ... Abstract: We study the statistical nature of Primordial fluctuations from an anisotropic inflation which is realized by a vector field coupled to an ...
arxiv.org/abs/1003.0056
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Probing the early Universe with Primordial Fluctuations ... - KIAS
Nov 7, 2012 ... Models generating Primordial fluctuations. Inflation ... Primordial density fluctuations (the origin of cosmic structure) are considered to be ...
workshop.kias.re.kr/PPC2012/downloads/takahashi_PPC2012.pdf
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Primordial fluctuations from nonlinear couplings - APS Link Manager ...
We study the spectrum of Primordial fluctuations in theories where the inflaton field is nonlinearly coupled to massless fields and/or to itself. Conformally invariant ...
link.aps.org/pdf/10.1103/PhysRevD.55.1812
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Non-adiabatic primordial fluctuations - Abstract - Classical and ...
We consider general mixtures of isocurvature and adiabatic cosmological perturbations. With a minimal assumption set consisting of the linearized Einstein ...
iopscience.iop.org/0264-9381/28/10/105008
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Primordial fluctuations | The Round Thing
Primordial fluctuations. David Benjamin Sherry, Blueballs (2009). #432 Folding pyramids – A new minimal geometric composition each day · Poisoned ...
theroundthing.com/documents/category/social-tags/primordial-fluctuations
Search results for "Primordial fluctuations"
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Primordial fluctuations in science
Non-Gaussian features of primordial fluctuations in single field ...
Oct 28, 2002 ... Abstract: We compute the three point correlation functions for primordial scalar and tensor fluctuations in single field inflationary models.
Primordial Fluctuations within Teleparallelism
Oct 14, 2011 ... Cornell University Library · We gratefully acknowledge support ... Title: Primordial fluctuations within Teleparallelism. Authors: Yi-Peng Wu, ...
Primordial Fluctuations from Inflation with a Triad of Background ...
Mar 5, 2012 ... Cornell University Library · We gratefully ... Title: Primordial fluctuations from Inflation with a Triad of Background Gauge Fields. Authors: Kei ...
Pointer states for primordial fluctuations in inflationary cosmology
Oct 24, 2006 ... Abstract: Primordial fluctuations in inflationary cosmology acquire classical properties through decoherence when their wavelengths become ...
Primordial fluctuations and cosmological inflation after WMAP 1.0 ...
Logo of Bielefeld University · Publications at Bielefeld University ... Primordial fluctuations and cosmological inflation after WMAP 1.0. Schwarz D ...
Physicists search for new physics in primordial quantum fluctuations
Mar 26, 2012 ... Physicists search for new physics in primordial quantum fluctuations .... the University of Chicago's Institute for Molecular Engineering highlight ...
2012 Workshop Details - Aspen Center for Physics
Sarah Shandera, Pennsylvania State University ... (LSS) confirm that the spectrum of Primordial fluctuations is Gaussian to a remarkable one part in a thousand, ...
[PDF]Probing the early Universe with Primordial Fluctuations ... - KIAS
... Universe with. Primordial fluctuations: beyond fNL. November 7, 2012@ PPC2012, KIAS. Tomo Takahashi. Department of Physics, Saga University, Japan ...
[PDF]The Nature of Primordial Fluctuations from Anisotropic Inflation
Department of Physics, Kyoto University, Kyoto 606-8501, Japan. 2. Centre for ... The Primordial fluctuations from inflation is supposed to be statistically isotropic, ...
[PDF]A note on the consistency condition of primordial fluctuations
Aug 2, 2012 ... Primordial fluctuations. Leonardo Senatorea,b and Matias Zaldarriagac. aStanford Institute for Theoretical Physics, Stanford University,. 382 via ...
Books on the term Primordial fluctuations
Particle Astrophysics
Particle Astrophysics
Donald H Perkins, 2003
of. primordial. fluctuations. The quantum fluctuations referred to above are 'zero, point' oscillations in the cosmic fluid. As soon as inflation commences, however, at superluminal velocity, most of the fluid will move outside the horizon scale I///.
Primordial cosmology
Primordial cosmology
Marco Valerio Battisti, Riccardo Benini, 2011
3.5.6 Adiabatic and isocurvature perturbations In this section we briefly discuss how the density perturbations in the early, radiation-dominated Universe, are characterized. These Primordial fluctuations are the initial conditions from which the ...
Primordial Cosmology
Primordial Cosmology
Patrick Peter, Jean-Philippe Uzan, 2013
The density field results from the gravitational collapse of primordial density perturbations. In this book, we will try to present the models capable of generating these Primordial fluctuations. It is, however, important to discuss some aspects of ...
Galaxy Formation
Galaxy Formation
M. S. Longair, 2008
The arguments presented above have been based upon the assumption that the spectrum of Primordial fluctuations was a scale-invariant power law of roughly Harrison–Zeldovich form with random phases. These properties are naturally ac- ...
The Primordial Universe - L'Univers Primordial: 28 June - 23 July 1999
The Primordial Universe - L'Univers Primordial: 28 June - 23 July 1999
P. Binétruy, R. Schaeffer, J. Silk, 2006
In summary, the basic ingredients underpinning the model are established and confirmed via several observational probes. The Primordial fluctuations are measured in the cosmic microwave background, where the rms amplitude on the last ...
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Blog posts on the term
Primordial fluctuations
Characterization of the primordial non-Gaussianity using the anisotropies of the CMB (17 May 2013)
indico.cern.ch/conferenceDisplay.py?confId=252141
Phys. Rev. D 81, 043509 (2010): Primordial fluctuations without scalar fields
link.aps.org/doi/10.1103/PhysRevD.81.043509
A Note on the Consistency Condition of Primordial Fluctuations - CERN Document Server
We show that the squeezed limit of (N+1)-point functions of primordial correlation functions in which one of the modes has a very small wavenumber can be inferred from the spatial variation of locally measured N-point function. We then show how in single clock inflation a long wavelength perturbation can be re-absorbed in the background cosmology and how in computing correlation functions the integrals of the interaction Hamiltonian are dominated by conformal times of order of the short wavelength modes, when the long mode is already outside of the horizon. This allows us to generalize the consistency condition for N-point functions to the case in which the short wavelength fluctuations are inside the horizon and derivatives acts on them. We further discuss the consistency condition in the soft internal squeezed limit in which in an (N+M)-point function with (N+M) short modes the sum of the first N modes is a very soft momentum. These results are very useful to study infrared effects in Inflation. Senatore, Leonardo; Zaldarriaga, Matias
cds.cern.ch/record/1436361
Phys. Rev. Lett. 101, 061301 (2008): Primordial Fluctuations and Non-Gaussianities in Multifield Dirac-Born-Infeld Inflation
link.aps.org/doi/10.1103/PhysRevLett.101.061301
ESA Science & Technology: Planck sees a cosmic journey 13 billion years in the making
Cosmologists using data from ESA's Planck satellite have compiled the first all-sky image of the distribution of dark matter across the entire history of the Universe as seen projected on the sky. This is made possible by analysing the tiny distortions imprinted on the photons of the Cosmic Microwave Background (CMB) by the gravitational lensing effect of massive cosmic structures. As photons travelled through these structures, which consist primarily of dark matter, their paths became bent, slightly changing the pattern of the CMB. Although noisy, this image is the first measurement performed over almost the whole sky of the gravitational potential that distorts the CMB, and is one of the highlights of Planck's cosmological results. With these unique data, cosmologists can investigate 13 billion years of the formation of structure in the Universe. The data agree very well with the expectations from the leading cosmological model that describes the origin and evolution of cosmic structure in the Universe.
sci.esa.int/science-e/www/object/index.cfm?fobjectid=51603
Reconstruction Primordial Fluctuations from Temperature Anisotropy
Reconstruction Primordial fluctuations from Temperature Anisotropy in Astrophysics is being discussed at Physics Forums
www.physicsforums.com/showthread.php?t=241601
The Fug of Life: Primordial Quantum Fluctuations
To get this 'blog' back up and running, here is a link to a good artilel from Physorg. com about Primordial Quantum Fluctuations.
thefugoflife.blogspot.com/2012/03/primordial-quantum-fluctuations.html
Physicists search for new physics in primordial quantum fluctuations | physics4me
"Everything should be as simple as it is, but not simpler", Albert Einstein
physicsforme.wordpress.com/2012/03/26/physicists-search-for-new-physics-in-primordial-quantum-fluctuations/
» Precise Measurements of Primordial Power Spectrum with 21 cm Fluctuations
arxiv:1303. 1688PDF Kazunori Kohri , Yoshihiko Oyama , Toyokazu Sekiguchi , Tomo Takahashi Link to: Inspire, ADS We discuss the issue of how precisely we can measure the primordial power spectrum by using future observations of 21 cm fluctuations and cosmic microwave background (CMB).
dmhunters.astroparticles.es/?p=5406
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