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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.

 

Jeudi mar 24, 2016
Speaker(s): 

In recent decades probing for the subtle indications of new physics in

experimental data has become increasingly difficult. The datasets have gotten

much bigger, the experiments more complex, and the signals ever smaller. Success

stories, like LIGO and Kepler, require a sophisticated combination of statistics

and computation, coupled with an appreciation of both the experimental realities

and the theoretical framework governing the data.



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Lundi mar 21, 2016
Speaker(s): 

I will begin by giving an overview of the current state of exoplanet

science, a field that has advanced tremendously in just the last few

years. While specialized instrumentation and observational facilities

have provided the data driving this advance, the development and

application of statistical techniques to interpret this data have been

of critical importance. These same tools are also at the core of all

data-driven science, and are thus applicable to many other fields of

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Jeudi mar 17, 2016
Speaker(s): 

Gravitational waves, as predicted by Einstein one hundred years ago, have been detected by the advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) in September last year. This finding marks the beginning of gravitational-wave astronomy. From now on, we are able to probe our universe using both long-range forces in nature.

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Mercredi mar 09, 2016
Speaker(s): 

In any quantum field theory, the energy flux at a point of spacetime can be negative. This would produce a repulsive gravitational field causing nearby light rays to defocus. This in turn threatens to produce a variety of exotic phenomena including traversable wormholes, warp drives, time machines, and evasion of singularity theorems. I will describe a new "quantum focusing conjecture" that prevents such pathologies. In the flat spacetime limit it reduces to a novel lower bound on the energy density, which can be proven for several classes of field theories.

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Mercredi fév 24, 2016
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Mercredi fév 17, 2016
Speaker(s): 

Precision atom interferometry is poised to become a powerful tool for discovery in fundamental physics. Towards this end, I will describe recent, record-breaking atom interferometry experiments performed in a 10-meter drop tower that demonstrate long-lived quantum superposition states with macroscopic spatial separations.

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Mercredi fév 03, 2016
Speaker(s): 

Radio pulsars are Nature's most perfect clock and hence are useful for precision work on a wide variety of physical and astrophysical topics, ranging from sensitive tests of relativistic gravity to constraining the equation of state of ultradense matter. I will describe current ongoing surveys for radio pulsars using the two largest radio telescopes in the world, and how these surveys are also valuable for searching for Fast Radio Bursts, a newly recognized astrophysical phenomenon of unknown origin.

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Jeudi nov 12, 2015
Speaker(s): 

In the summer of 2015, the speaker led a team at Microsoft Research, comprised primarily of research interns from seven universities, to demonstrate a social, ambulatory, Mixed Reality system for the first time. Each intern developed a preliminary, domain-specific exploration of how such a system could be used. One of the interns, Andrzej Banburski of the Perimeter Institute, demonstrated an interface to Mathematica.

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Mercredi nov 11, 2015
Speaker(s): 

A quantum entanglement is a special kind of correlation; it may yield a strong correlation that is not possible in a classical ensemble, or hide the correlation from all local observables. Especially important is the entanglement that arises from local interactions for its implications in many-body physics and future’s quantum technologies.

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Mercredi nov 04, 2015
Speaker(s): 

Topological phases of matter are phases of matter which are not characterized

by classical local order parameters of some sort. Instead, it is the global properties

of quantum many-body ground states which distinguish one topological phase from

another. One way to detect such global properties is to put the system on a topologically

non-trivial space (spacetime). For example, topologically ordered phases in (2+1)

dimensions exhibit ground state degeneracy which depends on the topology of the spatial manifold.

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