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Breakdown of Semiclassical Methods in de Sitter Space

Autor: Burgess, C. P., Holman, R., Leblond, L., Shandera, S.

Publikováno v: JCAP 1010:017,2010

Massless interacting scalar fields in de Sitter space have long been known to experience large fluctuations over length scales larger than Hubble distances. A similar situation arises in condensed matter physics in the vicinity of a critical point, a

Externí odkaz: http://arxiv.org/abs/1005.3551

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Super-Hubble de Sitter Fluctuations and the Dynamical RG

Autor: Burgess, C. P., Leblond, L., Holman, R., Shandera, S.

Publikováno v: JCAP 1003:033,2010

Perturbative corrections to correlation functions for interacting theories in de Sitter spacetime often grow secularly with time, due to the properties of fluctuations on super-Hubble scales. This growth can lead to a breakdown of perturbation theory

Externí odkaz: http://arxiv.org/abs/0912.1608

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Non-Gaussianity as a Probe of the Physics of the Primordial Universe and the Astrophysics of the Low Redshift Universe

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

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