Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Lyth, D."'
Autor:
Komatsu, E., Afshordi, N., Bartolo, N., Baumann, D., Bond, J. R., Buchbinder, E. I., Byrnes, C. T., Chen, X., Chung, D. J. H., Cooray, A., Creminelli, P., Dalal, N., Dore, O., Easther, R., Frolov, A. V., Gorski, K. M., Jackson, M. G., Khoury, J., Kinney, W. H., Kofman, L., Koyama, K., Leblond, L., Lehners, J. -L., Lidsey, J. E., Liguori, M., Lim, E. A., Linde, A., Lyth, D. H., Maldacena, J., Matarrese, S., McAllister, L., McDonald, P., Mukohyama, S., Ovrut, B., Peiris, H. V., Raeth, C., Riotto, A., Rodriguez, Y., Sasaki, M., Scoccimarro, R., Seery, D., Sefusatti, E., Seljak, U., Senatore, L., Shandera, S., Shellard, E. P. S., Silverstein, E., Slosar, A., Smith, K. M., Starobinsky, A. A., Steinhardt, P. J., Takahashi, F., Tegmark, M., Tolley, A. J., Verde, L., Wandelt, B. D., Wands, D., Weinberg, S., Wyman, M., Yadav, A. P. S., Zaldarriaga, M.
A new and powerful probe of the origin and evolution of structures in the Universe has emerged and been actively developed over the last decade. In the coming decade, non-Gaussianity, i.e., the study of non-Gaussian contributions to the correlations
Externí odkaz:
http://arxiv.org/abs/0902.4759
Autor:
Lyth, D H
Publikováno v:
Lect.Notes Phys.738:81-118,2008
Inflation models are compared with observation on the assumption that the curvature perturbation is generated from the vacuum fluctuation of the inflaton field. The focus is on single-field models with canonical kinetic terms, classified as small- me
Externí odkaz:
http://arxiv.org/abs/hep-th/0702128
Autor:
Lyth, D. H., Riotto, A.
Publikováno v:
Phys.Rev.Lett. 97 (2006) 121301
In brane inflationary scenarios, the cosmological perturbations are supposed to originate from the vacuum fluctuations of the inflaton field corresponding to the position of the brane. We show that a significant, and possibly dominant, contribution t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0607326
Autor:
Lyth, D. H.
Publikováno v:
JCAP0606:015,2006
In curvaton-type models, observable non-gaussianity of the curvature perturbation would come from a contribution of the form $(\delta\sigma)^2$, where $\delta\sigma$ is gaussian. I analyse this situation allowing $\delta\sigma$ to be scale-dependent.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0602285
Publikováno v:
JHEP0307:053,2003
The field responsible for the cosmological curvature perturbations generated during a stage of primordial inflation might be the ``curvaton'', a field different from the inflaton field. To keep the effective mass of the curvaton small enough compared
Externí odkaz:
http://arxiv.org/abs/hep-ph/0304050
Autor:
Lyth, D H
Publikováno v:
Phys.Lett. B526 (2002) 173-178
Cosmological perturbation theory fails in the new ekpyrotic and cyclic ekpyrotic scenarios, before the scale factor of the Universe reaches zero. As a result, a recently-proposed recipe for evolving the curvature perturbation through the bounce in th
Externí odkaz:
http://arxiv.org/abs/hep-ph/0110007
We discuss the evolution of linear perturbations about a Friedmann-Robertson-Walker background metric, using only the local conservation of energy-momentum. We show that on sufficiently large scales the curvature perturbation on spatial hypersurfaces
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010639