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Colloquium

This series covers all areas of research at Perimeter Institute, as well as those outside of PI's scope.

Seminar Series Events/Videos

Currently there are no upcoming talks in this series.

 

Mercredi fév 27, 2013
Speaker(s): 

Matrix
models, random maps and Liouville field
theory are prime tools which connect

random
geometry and quantum gravity in two dimensions. The
tensor track is a new program to extend this
connection to higher dimensions through

the
corresponding notions of tensor models, colored
triangulations and tensor group field theories. 

Collection/Series: 
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Lundi fév 25, 2013
Speaker(s): 

In the last few years there has been a burst of
progress in the field of massive gravity.  The construction of consistent
theories in which the graviton has a small mass has in turn led to the
development a new family of compelling, consistent low-energy modifications of
General Relativity.  These theories improve our understanding of the
interplay between gravity and particle physics and provide new approaches to
solving the cosmological constant problem.  In this talk I will review

Collection/Series: 
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Mercredi fév 20, 2013
Speaker(s): 

While the luminosity and mass distributions of quasars
has evolved dramatically with cosmic time, the physical properties of quasars
of a given luminosity are remarkably independent of redshift.  I will describe recent results on the spectra
of luminous quasars, the dark matter halos in which they sit, and the
intergalactic medium of their host galaxies, that are essentially
indistinguishable from moderate redshifts to z>6.

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Mercredi fév 06, 2013
Speaker(s): 

Advanced LIGO (aLIGO) and Advanced Virgo (AdV) are kilometer-scale
gravitational wave (GW) detectors that are expected to yield the first

direct observations of gravitational waves. I will   describe the

currently projected schedule, sensitivity, and sky
localization accuracy for the GW detector network in the next decade.

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Mercredi jan 30, 2013
Speaker(s): 

I
will discuss some basic notions in the theory of phonology (sound systems
in language). The sounds of a language are generally assumed to be
composed of smaller constituents, called features. The features that
make up a sound cannot be directly obtained from its pronunciation, but
rather must be inferred from the system of contrasts that are at play
in a particular language. How to determine which features are contrastive
presents a logical and empirical puzzle that may be interesting

Collection/Series: 

 

Mercredi jan 23, 2013
Speaker(s): 

I give an account of the Machian approach to dynamics,
from Mach's critique of Newton to the work of Barbour, Bertotti, York and
O'Murchadha, which culminated in the theory of Shape Dynamics, a new and
original way of thinking about General Relativity. I conclude commenting on the
present research lines in Shape Dynamics, and the opportunity it offers to
solve the problem of time in quantum gravity.

Support
for this colloquium is provided by The Templeton Frontiers Program.

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Mercredi jan 16, 2013
Speaker(s): 

Gravity
in string theory is a generalized version of Einstein's theory with some 
universal features that call for a reformulation

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Mercredi déc 12, 2012

The Rosenbluth Method is a classical kinetic growth Monte
Carlo algorithm for growing a self-avoiding walk by appending steps to its
endpoint.

This algorithm

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Mercredi nov 28, 2012
Speaker(s): 

A revolution is underway in the construction of ‘artificial atoms’ out
of superconducting electrical circuits. 
These macroscopic ‘atoms’ have quantized energy levels and can emit and
absorb quanta of light (in this case microwave photons), just like ordinary
atoms.  Unlike ‘real’ atoms, the
properties of these artificial atoms can be engineered to suit various
particular applications, and they can be connected together by wires to form
quantum ‘computer chips.’  This so-called

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Mercredi nov 21, 2012
Speaker(s): 
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