Format results
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Self-Similar Quasicrystals and Hyperbolic Honeycombs
Justin Kulp - Stony Brook University
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On quantum corrections to the celestial operator product in gravity
Roland Bittleston - Perimeter Institute for Theoretical Physics
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Melting crystals and cluster integrable systems
Mykola Semenyakin - Perimeter Institute for Theoretical Physics
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Holographic cameras: an eye for the bulk
Simon Caron-Huot - McGill University
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Geometry in Scattering Amplitudes
Andreas Helset - California Institute of Technology (Caltech)
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Bootstrapping the lattice Yang-Mills theory
Zechuan Zheng - Perimeter Institute for Theoretical Physics
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w(1+infinity) in 4D Gravity
Elizabeth Himwich - Harvard University
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Words to Describe a Black Hole
Ying Lin - Harvard University
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Towards a non-relativistic AdS/CFT duality
Andrea Fontanella - Trinity College Dublin
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Computability in QFT and tropical QFT
Michael Borinsky - Perimeter Institute for Theoretical Physics
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Constructing Conformal Bootstrap Equations from the Embedding Space OPE Formalism
Valentina Prilepina - Lomonosov Moscow State University
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Self-Similar Quasicrystals and Hyperbolic Honeycombs
Justin Kulp - Stony Brook University
Most people are familiar with periodic tessellations and lattices; from the floor in the PI Bistro to their favourite spin systems. In this talk, I will discuss two less familiar families of tessellations and their applications to high energy physics, condensed matter physics, and mathematics… -
On quantum corrections to the celestial operator product in gravity
Roland Bittleston - Perimeter Institute for Theoretical Physics
The question of whether the holomorphic collinear singularities of graviton amplitudes define a consistent chiral algebra has garnered much recent attention. I will discuss a version of this question for infinitesimal perturbations around the self-dual sector of 4d Einstein gravity. The… -
Melting crystals and cluster integrable systems
Mykola Semenyakin - Perimeter Institute for Theoretical Physics
The language of integrable systems is widely applicable to string theory. One context where it is useful is the Seiberg-Witten theory, describing low-energy dynamics of confined 4d N=2 supersymmetric gauge theories: the families of complex curves with differentials, playing a central role in this… -
Holographic cameras: an eye for the bulk
Simon Caron-Huot - McGill University
We consider four-point correlators in an arbitrary excited state of a quantum field theory. We show that when the theory and state are holographic, such correlators can produce high-quality movies of point-like bulk particles, revealing the geometry in which they move. In some situations, Einstein’s… -
Geometry in Scattering Amplitudes
Andreas Helset - California Institute of Technology (Caltech)
One central property of the S-matrix is its invariance under field redefinitions. I will discuss how the geometry of field space makes this invariance manifest. This geometric formulation also has practical consequences. Scattering amplitudes and the renormalization group equations for a theory of… -
Bootstrapping the lattice Yang-Mills theory
Zechuan Zheng - Perimeter Institute for Theoretical Physics
I will speak about my recent work with Vladimir Kazakov where we study the SU( Nc) lattice Yang-Mills theory in the planar limit, at dimensions D=2,3,4, via the numerical bootstrap method. It combines the Makeenko-Migdal loop equations, with the cut-off L on the maximal length of loops, and the… -
w(1+infinity) in 4D Gravity
Elizabeth Himwich - Harvard University
In this talk, I will show that the action of soft graviton operators generates a w(1+infinity) symmetry in gravitational theories minimally coupled to massless and massive scalar matter in 4D asymptotically flat spacetimes. I will discuss how the symmetry action follows from an infinite tower of… -
Words to Describe a Black Hole
Ying Lin - Harvard University
We revamp the constructive enumeration of 1/16-BPS states in the maximally supersymmetric Yang-Mills in four dimensions, and search for ones that are not of multi-graviton form. A handful of such states are found for gauge group SU(2) at relatively high energies, resolving a decade-old enigma. Along… -
From KMOC to WQFT in Yang-Mills and gravity
Leonardo de la Cruz - CEA Saclay
Recently, powerful quantum field theory techniques, originally developed to calculate observables in colliders, have been applied to describe classical observables relevant to gravitational wave physics. This has motivated a proliferation of approaches to extract classical information from quantum… -
Towards a non-relativistic AdS/CFT duality
Andrea Fontanella - Trinity College Dublin
The background geometry seen by a propagating string in the non-relativistic limit is non-Lorentzian. This motivates us to study the non-relativistic AdS/CFT correspondence as a new example of non-AdS holography. In this talk I will focus on the string side of the correspondence, keeping an… -
Computability in QFT and tropical QFT
Michael Borinsky - Perimeter Institute for Theoretical Physics
In general, observables in QFTs can only be computed perturbatively using Feynman integrals. In this talk, which is based on arXiv:2008.12310 and arXiv:2204.06414, I will address some questions on the computability of such observables. By looking at QFT through the lens of tropical geometry, one can… -
Constructing Conformal Bootstrap Equations from the Embedding Space OPE Formalism
Valentina Prilepina - Lomonosov Moscow State University
In this talk, I will describe how to implement the conformal bootstrap program in the context of the embedding space OPE formalism introduced by Fortin and Skiba (DOI:10.1007/JHEP06(2020)028). To begin with, I will give some background on the formalism. In particular, I will map out how to build two…