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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

TBA
jan 14 2015 - 2:00pm
Room #: 100
Speaker(s):
Scientific Areas:
TBA
jan 28 2015 - 2:00pm
Room #: 100
Speaker(s):
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TBA
fév 11 2015 - 2:00pm
Room #: 100
Speaker(s):
Scientific Areas:
fév 18 2015 - 2:00pm
Room #: 100
Scientific Areas:
mar 11 2015 - 2:00pm
Room #: 100
Scientific Areas:
avr 22 2015 - 2:00pm
Room #: 100
Scientific Areas:

 

Mercredi déc 03, 2014
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In (relatively) recent years some philosophers of physics have developed and advocated a new view about how to understand spatiotemporal structures posited in theories such as classical mechanics, relativistic theories and GR; it is called the 'dynamical approach' to spacetime (H. Brown 2005, Physical Relativity). The dynamical approach (DA) holds that spacetime structure should not be thought of as conceptually prior to the laws of nature, or as constraining the forms that the laws may have.

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Mercredi nov 26, 2014
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Quantum many-body systems ranging from a many-electron atom to a solid material are described by effective Hamiltonians which are obtained from more accurate Hamiltonians by neglecting or treating weak interactions perturbatively. Quantum complexity theory asks about the quantum computational power of such quantum many-body models for both practical as well as fundamental purposes.

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Mercredi nov 19, 2014
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Gravity in 1+1 dimension is classically trivial but, as shown by A. Polyakov in 1981, it is a non-trivial quantum theory, in fact a conformal field theory (the Liouville theory), and also a string theory. In the last decades many important results and connexions with various areas of mathematics and theoretical physics have been established, but some important issues remain to be understood.

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Mercredi nov 12, 2014
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The supermassive black hole in the centre of the Milky Way, Sgr A*, is an ideal target for testing the properties of black holes. A number of experiments are being prepared or conducted, such as the monitoring of stellar orbits, the search for radio pulsars or the recording of an image of the shadow of a event horizon. The talk puts these efforts in context with other tests of general relativity and its alternatives.

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Mercredi nov 05, 2014
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Quantum information theory has taught us that quantum theory is just one possible probabilistic theory among many others. In the talk, I will argue that this „bird’s-eye“ perspective does not only allow us to derive the quantum formalism from simple physical principles, but also reveals surprising connections between the structures of spacetime and probability which can be phrased as mathematical theorems about information-theoretic scenarios.

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Mercredi nov 05, 2014
Speaker(s): 

Quantum information theory has taught us that quantum theory is just one possible probabilistic theory among many others. In the talk, I will argue that this "bird's-eye" perspective does not only allow us to derive the quantum formalism from simple physical principles, but also reveals surprising connections between the structures of spacetime and probability which can be phrased as mathematical theorems about information-theoretic scenarios.

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Vendredi oct 31, 2014
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I will talk about the implications of the current LHC results and the Higgs discovery on the principle of Naturalness, that has been guiding particle physics for the last forty years. Then I will discuss the role that low energy experiments can play for the future of particle physics.

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Mercredi oct 15, 2014
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Gauge theories lie at the heart of our understanding of three of the four known forces in nature: the electromagnetic, weak and strong forces. Moreover, our best understood non-perturbative definition of a theory of quantum gravity is also given by a gauge theory. Yet, despite their absolutely central role in physics, gauge theories are still far from being tamed with our current theoretical tools.

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Mercredi oct 01, 2014
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Topologically ordered states, such as the fractional quantum Hall (FQH) states, are quantum states of matter with various exotic properties, including quasiparticles with fractional quantum numbers and fractional statistics, and robust topology-dependent ground state degeneracies. In this talk, I will describe a new aspect of topological states: their extrinsic defects. These include extrinsically imposed point-like or line-like defects that couple to the topological properties of the state in non-trivial ways.

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Mercredi sep 17, 2014
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Living things operate according to well-known physical laws, yet it is challenging to discern specific, non-trivial consequences of these constraints for how an organism that is a product of evolution must behave. Part of the difficulty here is that life lives very far from thermal equilibrium, where many of our traditional theoretical tools fail us. However, recent developments in nonequilibrium statistical mechanics may help light a way forward.

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