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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Louis Leblond


Explorations in Cosmology - Lecture 15
Abstract:
Date: 30/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 14
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Date: 29/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 13
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Date: 28/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 12
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Date: 27/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 11
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Date: 26/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 10
Abstract:
Date: 23/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 9
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Date: 22/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 8
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Date: 21/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 7
Abstract:
Date: 20/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 6
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Date: 19/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 5
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Date: 16/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 4
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Date: 15/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 3
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Date: 14/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 2
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Date: 13/03/2012 - 10:15 am

Explorations in Cosmology - Lecture 1
Abstract:
Date: 12/03/2012 - 10:15 am

Science in the Pub - How Does Science Work?
Abstract: One of humanity's defining traits is to be deeply curious about the world around us. We've all looked up at the night sky, marvelled at rainbows, and been awed by the power of lightening. We've also wondered how these and other natural phenomena work. This curiosity-driven process of investigatio... read more
Date: 18/10/2011 - 7:30 pm

From the Biggest Things to the Biggest Bang
Speaker(s): Louis Leblond
Abstract: Assuming that you are really (really) strong, what are the biggest objects in the Universe that hold together enough that you could throw them? What are they made of and why are they so big? In this talk, I will show how studies of the large scale structure of the Universe enable us to reconstruct t... read more
Date: 22/07/2011 - 7:00 am

From the biggest things to the Biggest Bang
Speaker(s): Louis Leblond
Abstract: Galaxy clusters are the biggest gravitationally bound structures in the Universe. Simple features of these objects can help us reconstruct the initial conditions at the Big-Bang and test the fundamental laws of physics.
Date: 13/07/2011 - 10:15 am
Collection: EinsteinPlus 2011

Resumming late time divergences and comparing thermal vs dS
Speaker(s): Louis Leblond
Abstract: I will argue that the dynamical renormalization group can be used to resum late time divergences appearing in loop computations in de Sitter. In the case of a scalar field with quartic interactions, the resummed propagator is the massive one. Standard mean field theory techniques can then be used to... read more
Date: 27/10/2010 - 11:45 am

Eternal Inflation
Speaker(s): Louis Leblond
Abstract:
Date: 03/05/2010 - 11:00 am

Gravitational Waves from a Decaying Network of Cosmic Strings
Speaker(s): Louis Leblond
Abstract:
Date: 08/12/2009 - 4:50 pm

Perturbative Bounds in Inflation & Quantum Loops
Speaker(s): Louis Leblond
Abstract: We estimate the size of loop corrections in various inflationary systems and determine the region of parameter space where the perturbation theory around a quasi de Sitter background is strongly coupled. In some models, we argue that backreaction to the inflatonary background become important before... read more
Date: 22/05/2009 - 11:30 am

Tachyon Mediated Non-Gaussianity
Speaker(s): Louis Leblond
Abstract: I will discuss the various sources of non-Gaussianity (NG) in a class of multi-field models of inflation. I will show that there is both an intrinsic and a local contribution to the NG although they both have the same shape. It is also possible in this class of models that the dominant part to the 3... read more
Date: 11/12/2008 - 4:00 pm

Limits from the Perturbative Regime of Inflation and Non-Gaussianity
Speaker(s): Louis Leblond
Abstract: The validity of the perturbative analysis during inflation imposes bounds on the inflationary parameters. For single field inflation, the current experimental bounds on non-Gaussianity necessarily imply that the physics is weakly coupled at CMB scales. In this talk, I will show that for models with ... read more
Date: 05/06/2008 - 3:45 pm
Collection: PASCOS 08
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