A parton picture of de Sitter space during slow-roll inflation

Add to your list(s) Download to your calendar using vCal

• David Seery (DAMTP)
• Friday 30 January 2009, 13:00-14:00
• Pavilion B Potter Room (B1.19).

If you have a question about this talk, please contact Dr H K Kunduri.

It is well known that expectation values of scalar field fluctuations in de Sitter space, such as those used to study the temperature anisotropy of the CMB , are afflicted with infra-red divergences. Long ago, Starobinsky proposed that some infra-red effects could be captured by coarse-graining over the long wavelength part of the fields, yielding a stochastic picture of spacetime on the very largest scales. I show that when quantum-mechanical loop corrections are taken into account the popular `separate universe’ picture of superhorizon evolution is exactly equivalent, in the leading logarithm approximation, to Starobinsky’s method. In particular, the time evolution of a box of de Sitter space can be understood in exact analogy with the DGLAP evolution of partons within a hadron, which describes a slow logarithmic evolution of the hadron’s constituent partons with the energy scale at whichthey are probed.

This talk is part of the DAMTP Friday GR Seminar series.

This talk is included in these lists:

• All CMS events
• All Talks (aka the CURE list)
• CMS Events
• Cosmology lists
• Cosmology, Astrophysics and General Relativity
• DAMTP Friday GR Seminar
• DAMTP info aggregator
• Interested Talks
• Kavli Institute for Cosmology Talk Lists
• Pavilion B Potter Room (B1.19)
• Priscilla
• School of Physical Sciences
• bld31

Note that ex-directory lists are not shown.