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.


Wednesday Feb 20, 2013

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.



Wednesday Feb 06, 2013

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.

Scientific Areas: 


Wednesday Jan 30, 2013

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



Wednesday Jan 23, 2013

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.

for this colloquium is provided by The Templeton Frontiers Program.

Scientific Areas: 


Wednesday Jan 16, 2013

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

Scientific Areas: 


Wednesday Dec 12, 2012

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

This algorithm



Wednesday Nov 28, 2012

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

Scientific Areas: 


Wednesday Nov 21, 2012


Wednesday Nov 14, 2012

The solutions to
the cosmological constant problems may involve modifying the very long-range
dynamics of gravity by adding new degrees of freedom.  As an example of a conservative and minimal
such modification, we consider the possibility that the graviton has a very
small mass.  Massive gravity has received
renewed interest due to recent advances which have resolved its traditional
problems.  This kind of modification has
some peculiar and unexpected features, and it points us towards a universe
which looks quite unfamiliar.

Scientific Areas: 


Wednesday Nov 07, 2012

A quantum communication channel can be put to many uses: it can transmit
classical information, private classical information, or quantum information.
It can be used alone, with shared entanglement, or together with other
channels. For each of these settings there is a capacity that quantifies a
channel's fundamental potential for communication.  In this introductory
talk, I will discuss what we known about the various capacities of a quantum
channel, including a discussion of synergies between different channels and

Scientific Areas: