Strings 2023

30 talks

July 24, 2023 - July 29, 2023

C23001

Collection TypeConference/School

Source RepositoryPIRSA

Description

The Perimeter Institute for Theoretical Physics is delighted to host the 33rd installment of Strings, the flagship annual conference for the extended string theory community.

Strings 2023 will take place at PI July 24-29. Capacity is limited to 200 in-person attendees. The programming will incorporate an interactive simulcast for virtual attendees.

Recorded talks: https://pirsa.org/C23001

Organizing Committee: Sabrina Pasterski,* Freddy Cachazo, Kevin Costello, Davide Gaiotto, Jaume Gomis, Rob Myers, Pedro Vieira, & Alex Buchel.

Territorial Land Acknowledgement

Perimeter Institute acknowledges that it is situated on the traditional territory of the Anishinaabe, Haudenosaunee, and Neutral peoples.

Perimeter Institute is located on the Haldimand Tract. After the American Revolution, the tract was granted by the British to the Six Nations of the Grand River and the Mississaugas of the Credit First Nation as compensation for their role in the war and for the loss of their traditional lands in upstate New York. Of the 950,000 acres granted to the Haudenosaunee, less than 5 percent remains Six Nations land. Only 6,100 acres remain Mississaugas of the Credit land.

Displaying 13 - 24 of 30

Research Talk 10 - A tensor model for approximate CFTs

Daniel Jafferis Harvard University
July 25, 2023

PIRSA:23070030
High Energy Physics
Research Talk 11 - Emanant symmetries

Nathan Seiberg Institute for Advanced Study (IAS)
July 25, 2023

PIRSA:23070031
High Energy Physics
Research Talk 12 - Non-Invertible Symmetry, Duality, and Anomalies

Clay Cordova University of Chicago
July 25, 2023

PIRSA:23070032
High Energy Physics
Challenge Talk 3 - Symmetry/Topological-Order correspondence -- from string theory to condensed matter physics

Xiao-Gang Wen Massachusetts Institute of Technology (MIT) - Department of Physics
July 26, 2023

PIRSA:23070021
High Energy Physics
Research Talk 13 - Six- and eleven-dimensional theories via superspace torsion and Poisson brackets

Ingmar Saberi Ludwig-Maximilians-Universität München (LMU)
July 26, 2023

PIRSA:23070028
High Energy Physics
Research Talk 14 - Irreversibility, QNEC, and defects

Gonzalo Torroba
July 26, 2023

PIRSA:23070035
High Energy Physics
Research Talk 15 - dS_2 supergravity

Beatrix Mühlmann
July 26, 2023

PIRSA:23070036
High Energy Physics
Research Talk 16 - The Hilbert space and holography of information in de Sitter quantum gravity

Suvrat Raju
July 26, 2023

PIRSA:23070037
High Energy Physics
Research Talk 17 - Off Shell Strings and Black Hole Entropy

Aron Wall
July 26, 2023

PIRSA:23070041
High Energy Physics
Research Talk 18 - Bespoke Dual Resonance

Grant Remmen
July 26, 2023

PIRSA:23070042
High Energy Physics
Challenge Talk 4 - Learning in a quantum world

John Preskill California Institute of Technology (Caltech) - Division of Physics Mathematics & Astronomy
July 27, 2023

PIRSA:23070022
High Energy Physics
Research Talk 19 - Regge sum rules and stringy amplitudes

Alexander Zhiboedov
July 27, 2023

PIRSA:23070040
High Energy Physics

Research Talk 10 - A tensor model for approximate CFTs

Daniel Jafferis Harvard University
July 25, 2023

PIRSA:23070030
High Energy Physics
Research Talk 11 - Emanant symmetries

Nathan Seiberg Institute for Advanced Study (IAS)
July 25, 2023

PIRSA:23070031
High Energy Physics
Research Talk 12 - Non-Invertible Symmetry, Duality, and Anomalies

Clay Cordova University of Chicago
July 25, 2023

PIRSA:23070032
High Energy Physics
Challenge Talk 3 - Symmetry/Topological-Order correspondence -- from string theory to condensed matter physics

Xiao-Gang Wen Massachusetts Institute of Technology (MIT) - Department of Physics
July 26, 2023

PIRSA:23070021
High Energy Physics
Research Talk 13 - Six- and eleven-dimensional theories via superspace torsion and Poisson brackets

Ingmar Saberi Ludwig-Maximilians-Universität München (LMU)
July 26, 2023

PIRSA:23070028
High Energy Physics
I will review some recent developments that attempt to put modern mathematical tools and structural insights to effective use in physics. The focus will be on two such tools. The first is a perspective on superspace geometry that leads to powerful structural analogies between twisted theories (which encode the dynamics of particular BPS subsectors) and their untwisted parents. The second deals with generalizations of typical field theories akin to the generalization from symplectic to Poisson phase spaces. As an application, one obtains an object with N=(2,0) superconformal symmetry in six dimensions. Working at the holomorphic level on flat space, this object becomes the current algebra of the exceptional simple superalgebra E(3|6), which localizes to the W_2 algebra and dimensionally reduces to sl(2) super Yang-Mills theory. This is a mixture of joint work with numerous collaborators, in particular Hahner, Raghavendran, and Williams.
Research Talk 14 - Irreversibility, QNEC, and defects

Gonzalo Torroba
July 26, 2023

PIRSA:23070035
High Energy Physics
In this talk we will analyze renormalization group flows on d-dimensional planar defects, embedded in a D-dimensional conformal field theory. This general setup includes the case of quantum field theory with no defects ($D=d$), as well as defects of different dimensionality that are of interest in high energy and condensed matter physics. Using methods from quantum information theory, we will establish the irreversibility of renormalization group flows for defect dimensions $d \le 4$, and for all $D$. The main ingredients in the proof are strong subadditivity of the entanglement entropy, the Markov property of the conformal vacuum, and the quantum null energy condition.
Research Talk 15 - dS_2 supergravity

Beatrix Mühlmann
July 26, 2023

PIRSA:23070036
High Energy Physics
I will discuss the interplay between 2d de Sitter and supersymmetry in two concrete supergravity models coupled to superconformal field theories. Upon fixing a supersymmetric analogue of the Weyl gauge these theories can be viewed as supersymmetric extensions of timelike Liouville theory with N=1 and N=2 supersymmetry respectively. Supersymmetric timelike Liouville is well behaved in the UV and combines supersymmetry with a positive cosmological constant and a de Sitter saddle. The theory is amenable to a variety of techniques including systematic loop expansions and localization methods.
Research Talk 16 - The Hilbert space and holography of information in de Sitter quantum gravity

Suvrat Raju
July 26, 2023

PIRSA:23070037
High Energy Physics
We obtain all solutions of the Wheeler-DeWitt equation with positive cosmological constant for a closed universe in the large-volume limit. We define a natural norm on the solution space and thereby obtain a description of the Hilbert space of quantum gravity in an asymptotically de Sitter spacetime. This provides the finite G_N generalization of the Hilbert space constructed by Higuchi using group averaging. All the states in this Hilbert space share the symmetries of the Euclidean vacuum. We use this property to generalize the principle of holography of information to de Sitter space: data about cosmological correlators (defined as appropriately gauge-fixed observables) in an arbitrary small region suffices to specify them everywhere.
Research Talk 17 - Off Shell Strings and Black Hole Entropy

Aron Wall
July 26, 2023

PIRSA:23070041
High Energy Physics
In order to derive the classical string action from the worldsheet, it is necessary to take string theory off shell. This can be done by a prescription of Tseytlin, who proposed taking the worldsheet sphere QFT partition function and *differentiating* it with the log of the UV cutoff. I will explain why this strange prescription always gives the correct answers, for both the S-matrix and equations of motion, to all orders in perturbation theory. I will also compare the Susskind-Uglum off-shell method of calculating black hole entropy, to the more popular (but also more dubious) orbifold method. Based on work with Amr Ahmadain (arXiv:2211.08607 and arXiv:2211.16448).
Research Talk 18 - Bespoke Dual Resonance

Grant Remmen
July 26, 2023

PIRSA:23070042
High Energy Physics
String amplitudes famously accomplish several extraordinary and interrelated mathematical feats, including an infinite spin tower, tame UV behavior, and dual resonance: the ability of the amplitude to be represented as a sum over a single scattering channel. But how unique are these properties to string amplitudes? In this talk, I will demonstrate that it is possible to construct infinite new classes of tree-level, dual resonant amplitudes with customizable, non-Regge mass spectra. Crucial ingredients are Galois theory and a particular dlog transformation of the Veneziano amplitude. The formalism generalizes naturally to n-point scattering and allows for a worldsheet-like integral representation. In the case of a Regge spectrum, I will investigate whether the structure of the Veneziano amplitude can be bootstrapped from first principles. Even there, we will find that there is extra freedom in the dynamics, allowing for a new class of dual resonant hypergeometric amplitudes with a linear spectrum.
Challenge Talk 4 - Learning in a quantum world

John Preskill California Institute of Technology (Caltech) - Division of Physics Mathematics & Astronomy
July 27, 2023

PIRSA:23070022
High Energy Physics
After reflecting on the fruitful connections between quantum information and quantum gravity, I'll discuss recent results about using classical and quantum machine learning to predict the properties of quantum systems.
Research Talk 19 - Regge sum rules and stringy amplitudes

Alexander Zhiboedov
July 27, 2023

PIRSA:23070040
High Energy Physics

Title	Speaker(s)	Date	Talk Type	Info
Research Talk 10 - A tensor model for approximate CFTs	Daniel Jafferis	2023-07-25	Conference	View details
Research Talk 11 - Emanant symmetries	Nathan Seiberg	2023-07-25	Conference	View details
Research Talk 12 - Non-Invertible Symmetry, Duality, and Anomalies	Clay Cordova	2023-07-25	Conference	View details
Challenge Talk 3 - Symmetry/Topological-Order correspondence -- from string theory to condensed matter physics	Xiao-Gang Wen	2023-07-26	Conference	View details
Research Talk 13 - Six- and eleven-dimensional theories via superspace torsion and Poisson brackets	Ingmar Saberi	2023-07-26	Conference	View details
Research Talk 14 - Irreversibility, QNEC, and defects	Gonzalo Torroba	2023-07-26	Conference	View details
Research Talk 15 - dS_2 supergravity	Beatrix Mühlmann	2023-07-26	Conference	View details
Research Talk 16 - The Hilbert space and holography of information in de Sitter quantum gravity	Suvrat Raju	2023-07-26	Conference	View details
Research Talk 17 - Off Shell Strings and Black Hole Entropy	Aron Wall	2023-07-26	Conference	View details
Research Talk 18 - Bespoke Dual Resonance	Grant Remmen	2023-07-26	Conference	View details
Challenge Talk 4 - Learning in a quantum world	John Preskill	2023-07-27	Conference	View details
Research Talk 19 - Regge sum rules and stringy amplitudes	Alexander Zhiboedov	2023-07-27	Conference	View details

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Format results

Research Talk 10 - A tensor model for approximate CFTs

Research Talk 11 - Emanant symmetries

Research Talk 12 - Non-Invertible Symmetry, Duality, and Anomalies

Challenge Talk 3 - Symmetry/Topological-Order correspondence -- from string theory to condensed matter physics

Research Talk 13 - Six- and eleven-dimensional theories via superspace torsion and Poisson brackets

Research Talk 14 - Irreversibility, QNEC, and defects

Research Talk 15 - dS_2 supergravity

Research Talk 16 - The Hilbert space and holography of information in de Sitter quantum gravity

Research Talk 17 - Off Shell Strings and Black Hole Entropy

Research Talk 18 - Bespoke Dual Resonance

Challenge Talk 4 - Learning in a quantum world

Research Talk 19 - Regge sum rules and stringy amplitudes