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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Richard Woodard


PIRSA:15080020  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Fine Tuning May Not Be Enough
Speaker(s): Richard Woodard
Abstract: This talk is based on arXiv:1506.07306, with Shun-Pei Miao. We argue that the fine tuning problems of scalar-driven inflation may be worse than is commonly believed. The reason is that reheating requires the inflaton to be coupled to other matter fields whose vacuum fluctuations alter the inflaton p... read more
Date: 11/08/2015 - 9:30 am

PIRSA:14020137  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Nonlocal cosmology
Speaker(s): Richard Woodard
Abstract: I review a class of nonlocally modified gravity models which were proposed to explain the current phase of cosmic acceleration without dark energy. Among the topics considered are deriving causal and conserved field equations, adjusting the model to make it support a given expansion history, why the... read more
Date: 27/02/2014 - 2:30 pm

PIRSA:10100073  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Interacting Quantum Fields in de Sitter Space
Speaker(s): Richard Woodard
Abstract: Infrared logarithms are factors of the logarithm of the inflationary scale factor which arise in quantum field theoretic loop corrections that involve either massless, minimally coupled scalars or gravitons. They have been found by myself and collaborators in 1PI functions and by Steven Weinberg in ... read more
Date: 29/10/2010 - 9:30 am

PIRSA:06110010  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Leading Log Solution for Yukawa During Inflation
Speaker(s): Richard Woodard
Abstract: TBA
Date: 14/11/2006 - 2:00 pm

PIRSA:06110053  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Modified Gravity as an Alternative to Dark Energy
Speaker(s): Richard Woodard
Abstract:
Date: 10/11/2006 - 11:30 am
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