Lecture - Non-local quantum computation mini-course
Alex May - Perimeter Institute for Theoretical Physics
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McNamara-Wang Reconstruction
Theo Johnson-Freyd - Dalhousie University
Lecture - Quantum Gravity, PHYS 644
Aldo Riello - Perimeter Institute for Theoretical Physics
Lecture - Mathematical Physics II, PHYS 777
Kevin Costello - Perimeter Institute for Theoretical Physics
Ringing of Rapidly Rotating Black Holes in Higher-derivative Gravity
Simon Maenaut - University of Copenhagen
Lecture - Quantum Matter, PHYS 777
Chong Wang - Perimeter Institute for Theoretical Physics
Lecture - Mathematical Physics II, PHYS 777
Kevin Costello - Perimeter Institute for Theoretical Physics
Lecture - Quantum Gravity, PHYS 644
Aldo Riello - Perimeter Institute for Theoretical Physics
Real-Time Path Integrals, Caustics and Interference in Cosmology
Job Feldbrugge - Perimeter Institute for Theoretical Physics
The status of single scalar field dark energy
Carlos Garcia-Garcia - University of Waterloo
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Lecture - Non-local quantum computation mini-course
Alex May - Perimeter Institute for Theoretical Physics
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McNamara-Wang Reconstruction
Theo Johnson-Freyd - Dalhousie University
I will say some words about nonunital categories, and tell you an awesome new theorem of McNamara and Wang: unitary QFTs are determined by their partition functions. -
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Lecture - Mathematical Physics II, PHYS 777
Kevin Costello - Perimeter Institute for Theoretical Physics
Can a multiverse theory explain the H_0 tension, the S_8 tension, the w(z) < -1 behavior and many other cosmological observations? Maybe!
Jan Ambjorn - University of Copenhagen
A simple multiverse model explains the late time exponential expansion of our universe without the need of a cosmological constant. Assuming that the local measurement of H_0 is correct, it also give a better fit to data than the standard LCDM model, as well as a z-dependent state parameter w(z)…-
Ringing of Rapidly Rotating Black Holes in Higher-derivative Gravity
Simon Maenaut - University of Copenhagen
Within the Effective Field Theory approach to gravity, deviations from General Relativity can be systematically described by higher-curvature operators. However, computing the resulting corrections to black hole quasinormal mode spectra remains challenging in the rapidly rotating regime, where… -
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Lecture - Mathematical Physics II, PHYS 777
Kevin Costello - Perimeter Institute for Theoretical Physics
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Real-Time Path Integrals, Caustics and Interference in Cosmology
Job Feldbrugge - Perimeter Institute for Theoretical Physics
Interference is one of the most universal phenomena in nature, as exemplified by the real-time Feynman path integral. Despite the ubiquity of interference patterns, their evaluation has often proven challenging. This is especially apparent when considering lensing in astrophysics in the wave optics… -
Resurgence in Lensing
Ue-Li Pen - University of Toronto
We present new solutions for Turok's complex semi-classical trajectories approach to path integral quantization. New results for the barrier, step potential and double well point to new experimentally testable eigenstates of tunneling, with implications for optics and quantum gravity. -
The status of single scalar field dark energy
Carlos Garcia-Garcia - University of Waterloo
We are entering an exciting era in cosmology, with tantalizing hints of dynamical dark energy. While current data are not sufficient to fully characterize its nature, they may already offer clues about its microphysical properties. Assuming that the latest observations (DESI BAO + SNe Ia + CMB) are…