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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Niayesh Afshordi


Lorentz symmetry: Broken, intact or deformed?
Abstract: Is aether technically natural?
I will discuss whether higher energy Lorentz violation should be considered a natural expectation in theories of quantum gravity with a preferred frame.
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If ... read more
Date: 24/10/2012 - 3:30 pm

Photons and Quantum Gravity in Astrophysics
Abstract: Asymptotically safe inflation and CMB polarization
The presence of complex critical exponents in the scaling behavior of the Newton constant and Cosmological  constant has dramatic consequences at the inflation scale. In particular an infinite... read more
Date: 22/10/2012 - 4:30 pm

Modern Cosmology
Speaker(s): Niayesh Afshordi
Abstract: This presentation will cover a number of topics in cosmology today including dark energy, dark matter and the cosmological constant.
Date: 09/07/2012 - 10:30 am

Trials and Tribulations of Aether
Speaker(s): Niayesh Afshordi
Abstract: The tremendous empirical success of Einstein's relativity has pushed Aether into a chapter in the history books, for nearly a century. However, a phenomenologically consistent quantum mechanical treatment of gravity has motivated a revival of aether, by taming its UV-divergences, o... read more
Date: 09/05/2012 - 11:20 am

Structure in the Phase Space and Dark Matter Astronomy
Speaker(s): Niayesh Afshordi
Abstract:
Date: 23/09/2011 - 3:40 pm

Cosmological constant problem: rethinking quantum and gravity
Speaker(s): Niayesh Afshordi
Abstract:
Date: 22/05/2010 - 9:00 am

Cosmology - Review (PHYS 621) - Lecture 5
Speaker(s): Niayesh Afshordi
Abstract:
Date: 04/12/2009 - 10:00 am

Cosmology - Review (PHYS 621) - Lecture 4
Speaker(s): Niayesh Afshordi
Abstract:
Date: 03/12/2009 - 10:00 am

Cosmology - Review (PHYS 621) - Lecture 3
Speaker(s): Niayesh Afshordi
Abstract:
Date: 02/12/2009 - 10:00 am

Cosmology - Review (PHYS 621) - Lecture 2
Speaker(s): Niayesh Afshordi
Abstract:
Date: 01/12/2009 - 10:00 am

Cosmology - Review (PHYS 621) - Lecture 1
Speaker(s): Niayesh Afshordi
Abstract:
Date: 30/11/2009 - 10:00 am

Cuscuton and Horava-Lifshitz gravity
Speaker(s): Niayesh Afshordi
Abstract:
Date: 09/11/2009 - 11:00 am

Black hole horizons and the origin of cosmic acceleration
Speaker(s): Niayesh Afshordi
Abstract: TBA
Date: 07/07/2009 - 3:00 pm

Gravitational aether as a solution to the CC problem and more!
Speaker(s): Niayesh Afshordi
Abstract:
Date: 27/05/2009 - 11:45 am

(Towards) the end of the cosmological constant problem!
Speaker(s): Niayesh Afshordi
Abstract: The cosmological constant problem is arguably the deepest gap in our understanding of modern physics. The discovery of cosmic acceleration in the past decade and its surprising coincidence with cosmic structure formation has added an extra layer of complexity to the problem. I will describe how revi... read more
Date: 19/03/2009 - 11:00 am

Lecture 14B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 04/12/2008 - 12:30 pm

Lecture 14A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 04/12/2008 - 10:00 am

Lecture 13B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 27/11/2008 - 12:30 pm

Lecture 13A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 27/11/2008 - 10:00 am

Lecture 12B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 20/11/2008 - 12:30 pm

Lecture 12A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 20/11/2008 - 10:00 am

Lecture 11B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 13/11/2008 - 12:30 pm

Lecture 11A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 13/11/2008 - 10:00 am

Lecture 10B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 06/11/2008 - 12:30 pm

Lecture 10A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 06/11/2008 - 10:00 am

Lecture 9B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 30/10/2008 - 12:30 pm

Lecture 9A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 30/10/2008 - 10:00 am

Observational Evidence for Massive Gravity
Speaker(s): Niayesh Afshordi
Abstract:
Date: 23/10/2008 - 2:25 pm

Lecture 7B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 16/10/2008 - 12:30 pm

Lecture 7A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 16/10/2008 - 10:00 am

Lecture 6B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 09/10/2008 - 12:30 pm

Lecture 6A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 09/10/2008 - 10:00 am

Lecture 5B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 02/10/2008 - 12:30 pm

Lecture 5A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 02/10/2008 - 10:00 am

Lecture 4B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 25/09/2008 - 12:30 pm

Lecture 4A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 25/09/2008 - 10:00 am

Lecture 3B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 18/09/2008 - 12:30 pm

Lecture 3A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 18/09/2008 - 10:00 am

Lecture 2B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 11/09/2008 - 12:30 pm

Lecture 2A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 11/09/2008 - 10:00 am

Lecture 1B
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 04/09/2008 - 12:30 pm

Lecture 1A
Abstract: This course is aimed at advanced undergraduate and beginning graduate students, and is inspired by a book by the same title, written by Padmanabhan. Each session consists of solving one or two pre-determined problems, which is done by a randomly picked student. While the problems introduce various s... read more
Date: 04/09/2008 - 10:00 am

Gravitational Aether as a solution to the cosmological constant problem
Speaker(s): Niayesh Afshordi
Abstract:
Date: 03/06/2008 - 5:00 pm
Collection: PASCOS 08

Primordial non-Gaussianity, statistics of collapsed objects, and the ISW effect
Speaker(s): Niayesh Afshordi
Abstract:
Date: 10/03/2008 - 2:45 pm

Physics beyond the Horizon
Speaker(s): Niayesh Afshordi
Abstract: The history of human knowledge is often highlighted by our efforts to explore beyond our apparent horizon. In this talk, I will describe how this challenge has now evolved into our quest to understand the physics at/beyond the cosmological horizon, some twenty orders of magnitude above Columbus' ori... read more
Date: 20/02/2008 - 2:00 pm
Series: Colloquium

Physics Beyond the Horizon
Speaker(s): Niayesh Afshordi
Abstract: The history of human knowledge is often highlighted by our efforts to explore beyond our apparent horizon. In this talk, I will describe how this challenge has now evolved into our quest to understand the physics at/beyond the cosmological horizon, some twenty orders of magnitude above Columbus’s ... read more
Date: 25/01/2008 - 3:00 pm
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