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# Video Library

Since 2002 Perimeter Institute has been recording seminars, conference talks, and public outreach events using video cameras installed in our lecture theatres.  Perimeter now has 7 formal presentation spaces for its many scientific conferences, seminars, workshops and educational outreach activities, all with advanced audio-visual technical capabilities.  Recordings of events in these areas are all available On-Demand from this Video Library and on Perimeter Institute Recorded Seminar Archive (PIRSA)PIRSA is a permanent, free, searchable, and citable archive of recorded seminars from relevant bodies in physics. This resource has been partially modelled after Cornell University's arXiv.org.

## Neutron Star Crust Microphysics

Wednesday Jun 22, 2011
Speaker(s):

New equations of state (EOSs) from extensive virial and relativistic mean field calculations will be presented. We construct thermodynamically consistent EOSs from slightly noisy free energy calculations, which satisfy the first law, and conserves entropy during adiabatic compression. However this requires a very careful procedure of numerically smoothing the entropy and then integrating the entropy to generate consistent free energies. We discuss various features of the EOS in different density, temperature, and proton fraction regimes.

Scientific Areas:

## Eternal inflation predicts that time will end

Wednesday Jun 22, 2011
Speaker(s):

Present treatments of eternal inflation regulate infinities by imposing a geometric cutoff. We point out that some matter systems reach the cutoff in finite time. This implies a nonzero probability for a novel type of catastrophe. According to the most successful measure proposals, our galaxy is likely to encounter the cutoff within the next 5 billion years.

Scientific Areas:

## The partition function of quantum de Sitter

Wednesday Jun 22, 2011
Speaker(s):

We propose that quantum gravity in de Sitter space should be de

Scientific Areas:

## Microphysics in Computational Relativistic Astrophysics - Discussion 2

Wednesday Jun 22, 2011
Speaker(s):

## Nucleosynthesis and Short Gamma-Ray Burst Central Engines

Wednesday Jun 22, 2011
Speaker(s):

Massive accretion disks may form from the merger of neutron star (NS)-NS or black hole-NS binaries, or following the accretion-induced collapse (AIC) of a white dwarf. These disks, termed hyper-accreting' due to their accretion rates up to several solar masses per second, may power the relativistic jets responsible for short duration gamma-ray bursts.

Scientific Areas:

## Predictions from geometric cutoffs in Eternal Inflation

Wednesday Jun 22, 2011
Speaker(s):
Scientific Areas:

## Neutrinos in supernova evolution and nucleosynthesis

Wednesday Jun 22, 2011

Massive accretion disks may form from the merger of neutron star (NS)-NS or black hole-NS binaries, or following the accretion-induced collapse (AIC) of a white dwarf. These disks, termed hyper-accreting' due to their accretion rates up to several solar masses per second, may power the relativistic jets responsible for short duration gamma-ray bursts.

Scientific Areas:

## Nucleosynthesis of Heavy Elements in Neutrino-Driven Winds and Neutron-Star Mergers

Wednesday Jun 22, 2011
Speaker(s):

The energy generated by the r-process can impact the dynamics of neutron star mergers. Solving a full r-process network coupled with the hydrodynamics becomes the necessary but it is computational very expensive. We have developed a simple model that can be implemented into hydrodynamic simulations and gives a very good estimate of the r-process heating.

Scientific Areas:

## The Hidden Phase Space of our Universe

Wednesday Jun 22, 2011

By combining insights from black holes and string theory we argue for the existence of a hidden phase space associated with an underlying fast dynamical system, which is largely invisible from a macroscopic point of view. The dynamical system is influenced by slow macroscopic observables, such as positions of objects. This leads to a collection of reaction forces, whose leading order Born Oppenheimer force is determined by the general principle that the phase space volume of the underlying system is preserved.

Scientific Areas:

## The semiclassical wavefunction of the universe near de Sitter space

Tuesday Jun 21, 2011
Speaker(s):

We make some remarks about the semiclassical wavefunction of the universe around de-Sitter space. In five dimensional gravity with a positive cosmological constant it is possible to compute the full semiclassical measure for arbitrary geometries at superhorizon scales. In four dimensions, the same computation can be reformulated as a problem in conformal gravity.

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## Next Public Lecture

### NEIL TUROK: WE ARE INNOVATORS: A TALK ON THE POWER OF IDEAS

Wednesday Oct 18, 2017

## RECENT PUBLIC LECTURE

### Erik Verlinde: A new view on gravity and the dark side of the cosmos

Speaker: Erik Verlinde