%0 Journal Article %1 Burgess2009 %A Burgess, C. P. %A Leblond, L. %A Holman, R. %A Shandera, S. %D 2009 %K Sitter perturbations %T Super-Hubble de Sitter Fluctuations and the Dynamical RG %U http://arxiv.org/abs/0912.1608 %X 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 at late times. We argue that Dynamical Renormalization Group (DRG) techniques provide a convenient framework for interpreting and resumming these secularly growing terms. In the case of a massless scalar field in de Sitter with quartic self-interaction, the resummed result is also less singular in the infrared, in precisely the manner expected if a dynamical mass is generated. We compare this improved infrared behavior with large-N expansions when applicable.

@article{Burgess2009, abstract = { 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 at late times. We argue that Dynamical Renormalization Group (DRG) techniques provide a convenient framework for interpreting and resumming these secularly growing terms. In the case of a massless scalar field in de Sitter with quartic self-interaction, the resummed result is also less singular in the infrared, in precisely the manner expected if a dynamical mass is generated. We compare this improved infrared behavior with large-N expansions when applicable. }, added-at = {2009-12-11T14:32:33.000+0100}, author = {Burgess, C. P. and Leblond, L. and Holman, R. and Shandera, S.}, biburl = {https://www.bibsonomy.org/bibtex/2422da9c472dd3d7a369804b9153fa3de/jpschaar}, description = {Super-Hubble de Sitter Fluctuations and the Dynamical RG}, interhash = {764c1b9201eb72e39b3928bf903d3950}, intrahash = {422da9c472dd3d7a369804b9153fa3de}, keywords = {Sitter perturbations}, note = {cite arxiv:0912.1608 Comment: 33 pages, 4 figures}, timestamp = {2009-12-11T14:32:33.000+0100}, title = {Super-Hubble de Sitter Fluctuations and the Dynamical RG}, url = {http://arxiv.org/abs/0912.1608}, year = 2009 }