Format results
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Asymptotically isometric codes
Thomas Faulkner - University of Illinois Urbana-Champaign
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Energy transport for thick holographic branes
Stefano Baiguera - National Institute for Nuclear Physics
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Self-Dual Black Holes in Celestial Holography
Alfredo Guevara - Harvard University
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Burns space and holography
Atul Sharma - Harvard University
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Gravitational Observables from Scattering Amplitudes
Donal O'Connell - University of Edinburgh
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The Off-shell String Effective Action and Black Hole Entropy
Amr Ahmadain - University of Cambridge
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Bubbling wormholes and matrix models
Ji Hoon Lee - ETH Zurich
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The 't Hooft equation as a quantum spectral curve
David Vegh - Queen Mary University of London
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Chern-Simons, time-reversal, bordism, and Smith homomorphisms.
Matthew Yu - University of Oxford
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Dynamical fixed points in holography: theory and cosmological applications
Alex Buchel - Western University
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Asymptotically isometric codes
Thomas Faulkner - University of Illinois Urbana-Champaign
I review a class of quantum error correcting codes that directly takes into account the large-N aspects of holographic theories. I will discuss some aspects of the vacuum sector of these codes and use them to show the equivalence between two different approaches to entanglement wedge reconstruction… -
Energy transport for thick holographic branes
Stefano Baiguera - National Institute for Nuclear Physics
Universal properties of two-dimensional conformal interfaces are encoded by the flux of energy transmitted and reflected during a scattering process. In this talk, I will develop a method that allows me to extend previous results based on thin-brane holographic models to smooth domain-wall solutions… -
Self-Dual Black Holes in Celestial Holography
Alfredo Guevara - Harvard University
We construct two-dimensional quantum states associated to four-dimensional linearized rotating self-dual black holes in (2,2) signature Klein space. The states are comprised of global conformal primaries circulating on the celestial torus, the Kleinian analog of the celestial sphere. By introducing… -
The aAdS Geometry of Heavy CFT Correlators: Bananas to Doors to… Wormholes?
We develop the bulk geometric description of correlation functions of operators whose scaling dimensions are of order the central charge in AdS/CFT. We follow a bottom-up approach, discussing solutions to Einstein gravity that are closely related to familiar black holes in AdS. In order to reproduce… -
Burns space and holography
Atul Sharma - Harvard University
I will construct a top-down example of celestial holography, based on recent work with Costello and Paquette. Our duality relates certain models of self-dual gauge theory and conformal gravity, placed on an asymptotically flat four dimensional spacetime called Burns space, to a two dimensional… -
Gravitational Observables from Scattering Amplitudes
Donal O'Connell - University of Edinburgh
Gravity is exciting from both theoretical and observational perspectives. In this talk, I will discuss how gravitational observables, such as waveforms, can be determined from scattering amplitudes in quantum field theory. We can therefore use the full arsenal of theoretical collider physics to… -
The B-RNS-GSS formalism in heterotic supergravity backgrounds
Lucas Nogueira de Sá Martins - ICTP - SAIFR
A new approach for the first quantization of superstrings, called B-RNS-GSS formalism, is being constructed. It consists of quantizing embeddings of super surfaces into superspaces. As in the classical theory of super-embeddings, it has twistor-like variables. In this talk, besides motivating the… -
The Off-shell String Effective Action and Black Hole Entropy
Amr Ahmadain - University of Cambridge
Taking string theory off shell requires breaking Weyl invariance on the worldsheet, i.e. the worldsheet theory is now a QFT instead of a CFT. I will explain Tseytlin’s first-quantized approach to taking the worldsheet theory off-shell in a consistent manner, with a particular emphasis on the… -
Bubbling wormholes and matrix models
Ji Hoon Lee - ETH Zurich
Abstract: TBA Zoom link: https://pitp.zoom.us/j/92398762552?pwd=OXdkemQvbGltdWs3eW1GVWNRbGhldz09 -
The 't Hooft equation as a quantum spectral curve
David Vegh - Queen Mary University of London
In this talk, I examine the massless 't Hooft equation. This integral equation governs meson bound state wavefunctions in 2D SU(N) gauge theory in the large-N limit, and it can also be obtained by quantizing a folded string in flat space. The folded string is a limiting case of a more general setup… -
Chern-Simons, time-reversal, bordism, and Smith homomorphisms.
Matthew Yu - University of Oxford
Chern-Simons theories can possess 't Hooft anomalies for time-reversal symmetry. In this talk, we will discuss abelian Chern-Simons theories with an interesting time-reversal symmetry algebra and compute the classification of the anomaly, which is captured by a bordism group. In order to get the… -
Dynamical fixed points in holography: theory and cosmological applications
Alex Buchel - Western University
Dynamical fixed points are late-time attractors of interactive QFTs that differ from thermal equilibria by a constant entropy production rate. We use holographic framework to analyze such fixed points of strongly coupled gauge theories, driven by homogeneous and isotropic expansion of the background…