Holography at finite radius

I will discuss certain irrelevant operator deformations of holographic conformal field theories that define a one parameter family of quantum field theories which are thought to be dual to quantum gravity in finite regions. 
Some examples include the "$T\bar{T}$ deformation of two dimensional holographic CFTs, its generalisations and higher dimensional cousins.

Toward AGT for general algebraic surfaces

The Alday-Gaiotto-Tachikawa correspondence connects gauge theory on a fourfold with conformal field theory. We are interested in a certain algebro-geometric incarnation of this framework, where the fourfold is an algebraic surface and instantons/differential geometry are replaced with sheaves/algebraic geometry. In this talk, we will present a certain approach to AGT that yields partial results for quite general surfaces, and ask questions about what still needs to be done to state and prove the full correspondence in the language of algebraic geometry.

Langlands duality and self-duality for Hitchin systems

I will sketch why self-dual versions of the moduli of G-Higgs bundles are expected to arise physically from the study of 4d theories of class S. I will then describe an extension of the Langlands duality results of Hausel-Thaddeus (G=SL(n)) and Donagi-Pantev (arbitrary reductive G) that yields self-dual moduli spaces as a corollary.

Perimeter’s Physica Phantastica series provides opportunity for your class to dive into modern physics with an engaging 60-minute talk followed by 30-minutes of Q&A. Sessions are led by PhD-level scientists on the Outreach team and are held on-site at Perimeter Institute, at 31 Caroline Street North, Waterloo, and take place in our 200-seat theatre. 

 

The Physica Phantastica format is:

9:15am – Arrival

9:30am - Presentation begins

10:30am – Q&A Session

11:00am – Departure

 

Title: What’s Inside a Black Hole?

Abstract: Black holes are some of the most fascinating and mysterious objects in the Universe. They are regions of space where gravity is so strong that nothing can escape. But how do we “see” an object that traps everything including light? Join us as we explore several clever methods astronomers have devised to observe black holes. We’ll also look at what happens to you if you fall into a black hole and how, in theory, you can use them to time travel.

 

The session will be offered on two dates.

  • Tuesday, November 20 - recommended for Grade 11/12 Physics classes
  • Thursday, November 29 - recommended for Grade 9-10 Science classes

(The grade levels are guidelines only and are provided to give you an idea of the level of the talk. You may register classes outside the recommended grade level if you feel it will be a good fit.)

 

To apply to attend, please complete the form below. You will receive an email response within 2 business days of your request. Your registration should not be considered final until you receive confirmation via email. Reservations are accepted on an as-received basis until fully booked. 

 

Please enter any additional notes or questions below. If any of your students have accessibility concerns, please outline them here and we will contact you if further detail is required.

Estelle Maeva - 2018-10-20

Adiabatic optimization without a priori knowledge of the spectral gap

Performing a quantum adiabatic optimization (AO) algorithm with the time-dependent Hamiltonian H(t) requires one to have some idea of the spectral gap γ(t) of H(t) at all times t.

Computational Physics - Lecture 3