landscape days in practical cosmology
DESCRIPTION
Landscape days in Practical Cosmology. Landscape days in Practical Cosmology. After Years of Self-reproducing Inflationary Universe in Cosmology. Fluctuations in the Universe with Compact Extra Dimensions Scanning Inflation Modulated Fluctuations. L. Kofman CITA. Perimeter, March 2005. - PowerPoint PPT PresentationTRANSCRIPT
Landscape days in Practical Cosmology
Landscape days in Practical Cosmology
After Years of Self-reproducingInflationary Universe in Cosmology
Fluctuations in the Universe withCompact Extra Dimensions
Scanning Inflation
Modulated Fluctuations
Perimeter, March 2005
L. KofmanCITA
string theoristCY
AdS3+1 FRW
Fluctuations in Cosmology with Compactification
string theoristCY
AdS3+1 FRW
3+1 FRW
Fluctuations in Cosmology with Compactification
CYcosmologist
string theorist
Practical cosmologist
CY
AdS
CY +fluctuations
3+1 FRW
3+1 FRW
3+1 FRW +fluctuations
Fluctuations in Cosmology with Compactification
CYcosmologist
background
fluctuations
Fluctuations in Cosmology with Compactification
ds2=A2(y)[(à dt2+e2Htdx~2) +gabdyadyb]
dS4 â M
Gravitational instability of anysotropocgeometry
Too strong fluxes lead to new instability
Summary
Theory of cosmological fluctuations in models withextra dimensions
Generic properties of fluctuations in 3+1+d dim
Instabilities exclude regions of landscape
Constraints on working stabilization
Potential observables: varying couplings/masses,Primordial fluctuations
Scanning Inflation R.Bond, C.Contaldi,A.Frolov, L.KofmanT.SouradeepP.Vandrevange
Bottom-up
Inflaton Landscape @ Mont Tremblant Inflaton Landscape @ Mont Tremblant
scanning acceleration histories
Ensemble of Inflationary trajectories
Chebyshev decomposition
Space of models opens wide
Observational constraints on trajectories
Markov Chain Monte Carlo
Degeneracy of the Potential Reconstruction
Modulated Fluctuations
Hà1
x~
î ÿ(x~)
î ÿ =Rd3k(akÿk(t)eik
~x~+h:c:)
t
Light field at inflation
Inflation radiation
Modulated fluctuations in Hybrid Inflation
inhomogeneous waterfall
movie
Tachyonic Preheating
Modulated fluctuations in Chaotic Inflation
Resonant Preheating
Modulated fluctuations in Chaotic Inflation
Zoology of Cosmic Fluctuations
Scanning Inflation
Modulated Fluctuations
Fluctuations in the Universe withCompact extra dimension
Lancaster, March 2005
L. KofmanCITA
Some Movie
Inflaton Landscape @ Mont Tremblant Inflaton Landscape @ Mont Tremblant
scanning acceleration histories