Journalklubb

Målgruppen för journalklubben är doktorander och postdocs som forskar om olika ämnen inom teoretisk fysik. Idén är att vi möts för att lära oss och diskutera klassiska och intressanta ämnen inom teoretisk fysik.
Organisatör: Giulia Fardelli (giulia.fardelli@physics.uu.se)

Talks - Spring 2022

Islands outside the horizon

Speaker: Filip Landgren

Abstract: By considering the entanglement wedge of the Hawking radiation of an evaporation black hole so called entanglement islands will appear. In this talk I will present how these islands can be used to derive the Page curve, thus solving one aspect of the information paradox. I will show where these islands come from and how they can be derived using a standard replica trick. This work was awarded the Breakthrough New Horizons prize in 2021 and gained huge traction. In this 2d toy model an AdS black hole was coupled to a flat heat bath in which the radiation could escape into. I will also present some pressing issues with this model as well as how to move beyond it.
Papers:

  • Islands outside the horizon 1910.11077
  • Replica Wormholes and the Entropy of Hawking Radiation 1911.12333

Date: 17 June 2022, 1.30 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/j/69181515232


Constraints from unitarity on q-strings

Speaker: Maor Ben-Shahar
Papers:

  • On the unitarity and low energy expansion of the Coon amplitude 2201.12331
  • Extremal Effective Field Theories 2011.02957

Date: 10 June 2022, 1.30 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/j/69181515232


Cobordism Classes and the Swampland

Speaker: Matthew Magill
Papers:

Date: 03 June 2022, 1.30 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/j/69181515232


Riding bubbles to take off from the swamp

Speaker: Daniel Panizo
Papers:

  • de Sitter cosmology on an expanding bubble 1907.04268
  • Curing with hemlock: escaping the swampland using instabilities from string theory 2103.17121
  • Daniel's notes for the talk: pdf, pdf

Date: 13 May 2022, 1.30 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/j/69181515232


Macaulay Matrix for Feynman Integrals: Linear Relations and Intersection Numbers

Speaker: Carlos Rodriguez
Papers:

  • Macaulay Matrix for Feynman Integrals: Linear Relations and Intersection Numbers 2204.12983

Date: 06 May 2022, 1.30 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/j/69181515232


Gaudin Models and Multipoint Conformal Blocks

Speaker: Simon Ekhammar
Papers:

  • Gaudin Models and Multipoint Conformal Blocks: General Theory 2105.00021

Date: 22 April 2022, 1.30 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/j/69181515232


Broken R-symmetry and defect conformal manifolds

Speaker: Charles Thull
Papers:

  • Broken R-symmetry and defect conformal manifolds 2203.17157

Date: 08 April 2022, 1.30 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/j/69181515232


Non-invertible Duality Defects

Speaker: Vladimir Bashmakov
Papers:

  • Kramers-Wannier-like duality defects in (3+1)d gauge theories 2111.01141
  • Non-invertible Duality Defects in 3+1 Dimensions 2111.01139

Date: 25 March 2022, 1.30 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/j/69181515232


Geometry-Kinematics Duality

Speaker: Lucia Garozzo
Papers:

Date: 18 March 2022, 1.30 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/j/69181515232


Localised magnetic field in the O(N) model

Speaker: Parijat Dey
Papers:

  • Localised magnetic field in the O(N) model 2112.10634

Date: 11 March 2022, 1.30 pm
Location: Å80127 or Zoom https://uu-se.zoom.us/j/69181515232


Classical Double Copy of Worldline Quantum Field Theory

Speaker: Filippo Balli
Papers:

  • Classical Double Copy of Worldline Quantum Field Theory 2109.10345

Date: 04 March 2022, 1.30 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/j/69181515232


Test black holes, scattering amplitudes and perturbations of Kerr spacetime

Speaker: Justin Vines (AEI Potsdam)
Papers:

  • Test black holes, scattering amplitudes and perturbations of Kerr spacetime 1909.07361

Date: 25 February 2022, 1.30 pm
Location: Å80101 or Zoom https://uu-se.zoom.us/j/69181515232


On-shell Correlators and Color-Kinematics Duality in Curved Symmetric Spacetimes

Speaker: Alex Edison
Papers:

  • On-shell Correlators and Color-Kinematics Duality in Curved Symmetric Spacetimes 2201.05147

Date: 18 February 2022, 1.30 pm
Location: Å80101 or Zoom https://uu-se.zoom.us/j/69181515232


AdS Bulk Locality from Sharp CFT Bounds

Speaker: Giulia Fardelli
Papers:

  • AdS Bulk Locality from Sharp CFT Bounds 2106.10274

Date: 04 February 2022, 1.30 pm
Location: Å4004 or Zoom https://uu-se.zoom.us/j/69181515232


Where is String Theory?

Speaker: Alessandro Georgoudis
Papers:

Date: 04 February 2022, 1.30 pm
Location: Å80115 or Zoom https://uu-se.zoom.us/j/69181515232


A Note on Complex Spacetime Metrics

Speaker: Rodolfo Panerai
Papers:

Date: 28 January 2022, 1.30 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/j/69181515232


Automorphic Spectra and the Conformal Bootstrap

Speaker: Andrea Manenti
Papers:

  • Automorphic Spectra and the Conformal Bootstrap 2111.12716

Date: 21 January 2022, 1.30 pm
Location: Å4005 or Zoom https://uu-se.zoom.us/j/69181515232

Talks - Fall 2021

Codes, Lattices, and CFTs at Higher Genus

Speaker: Johan Henriksson (Pisa U.)
Papers:

  • Codes, Lattices, and CFTs at Higher Genus 2112.05168

Date: Wednesday 15 December 2021, 3.15 - 4.45 pm
Location: Å90101 or Zoom https://uu-se.zoom.us/j/69181515232


BV-quantization of fuzzy field theories

Speaker: Hans Nguyen (Nottingham U.)
Papers:

  • Batalin-Vilkovisky quantization of fuzzy field theories 2107.02532

Date: 10 December 2021, 1.30 - 3.00 pm
Location: Å80127 or Zoom https://uu-se.zoom.us/j/69181515232


Flat connections in three-manifolds and classical Chern-Simons invariant

Speaker: Roman Mauch
Papers:

  • Flat connections in three-manifolds and classical Chern-Simons invariant 1710.09629

Date: 03 December 2021, 1.30 - 3.00 pm
Location: Å80101 or Zoom https://uu-se.zoom.us/j/69181515232


A CFT optical theorem and conformal Regge theory

Speaker: Sourav Sarkar
Papers:

  • The perturbative CFT optical theorem and high-energy string scattering in AdS at one loop 2012.01515

Date: 26 November 2021, 1.30 - 3.00 pm
Location: ITC 1111 or Zoom https://uu-se.zoom.us/j/69181515232


Heavy particles and the binary inspiral problem

Speaker: Kays Haddad
Papers:

  • Exponentiation of the leading eikonal with spin 2109.04427
  • On-shell heavy particle effective theories 2001.09164
  • Heavy Black Hole Effective Theory 1908.10308

Date: 19 November 2021, 1.30 - 3.00 pm
Location: Å80127 or Zoom https://uu-se.zoom.us/j/69181515232


Temperature dualities from Eisenstein series in higher dimensions

Speaker: Francesco Alessio
Papers:

  • Notes on massless scalar field partition functions, modular invariance and Eisenstein series 2111.03164

Date: 12 November 2021, 1.30 - 3.00 pm
Location: Å80101 or Zoom https://uu-se.zoom.us/j/69181515232


On the Entanglement Entropy in CFTs and Holography

Speaker: Jacopo Sisti
Papers:

  • Monodromy Defects in Free Field Theories 2104.01220
  • Holographic Entanglement Entropy of the Coulomb Branch 2012.05188
  • Corner contributions to holographic entanglement entropy in AdS4/BCFT3 1708.05080

Date: 29 October 2021, 1.30 - 3.00 pm
Location: Å80127 or Zoom https://uu-se.zoom.us/j/69181515232


Massive matter and the double copy

Speaker: Ingrid Vazquez-Holm
Papers:

  • Extracting Einstein from the Loop-Level Double-Copy 2108.06798
  • Loop-Level Double-Copy for Massive Quantum Particles 2010.13435

Date: 15 October 2021, 1.30 - 3.00 pm
Location: Å80101 or Zoom https://uu-se.zoom.us/j/69181515232


Amplitudes in the eikonal limit, black-hole scattering and radiation

Speaker: Carlo Heissenberg
Papers:

  • Infrared Divergences and the Eikonal Exponentiation 2105.04594
  • The Eikonal Approach to Gravitational Scattering and Radiation at O(G3) 2104.03256
  • Radiation Reaction from Soft Theorems 2101.05772
  • Universality of ultra-relativistic gravitational scattering 2008.12743

Date: 08 October 2021, 1.30 - 3.00 pm
Location: Å10132 or Zoom https://uu-se.zoom.us/j/69181515232


Building gauge theories and Calabi Yaus in diverse dimensions

Speaker: Azeem Hasan
Abstract: Minimally supersymmetric gauge theories in various dimensions can be engineered on worldvolume of D-branes probing transverse Calabi Yau singularities. This setup is most well studied for N=1 theories in 4d on D3 branes probing Calabi Yau threefolds. Less well studied are (0,2) theories in 2d on D1 branes probing fourfolds and N=1 matrix models on D(-1) branes probing fivefolds. In this talk I will describe an algorithm (arXiv:2004.13765) that leverages the uniform description of these theories developed in arXiv:1904.07954 to construct (0,2) 2d theories and N=1 0d matrix models and the corresponding geometries starting from better understood 4d N=1 theories and the corresponding 3 folds.
Papers:

  • Calabi-Yau Products: Graded Quivers for General Toric Calabi-Yaus 2004.13765
  • Graded Quivers, Generalized Dimer Models and Toric Geometry 1904.07954

Date: 01 October 2021, 1.30 - 3.00 pm
Location: ITC 6140 or Zoom https://uu-se.zoom.us/j/69181515232


Towards F-theory Realizations of Exact MSSM Matter Spectra

Speaker: Muyang Liu
Abstract: The exact matter spectrum is a significant characteristic of 4D N=1 F-theory compactification, which is expected to match the particle physics we observe. This spectrum is specified by line bundles cohomologies associated to relevant matter curves under the presence of gauge background. In the study of realistic F-theory geometry, those line bundles in the consideration turn into the so-called root bundles. I will elaborate on the developments of interpretation and computation of root bundles based on work 2102.10115 and 2104.08297.
Papers:

  • Statistics of Limit Root Bundles Relevant for Exact Matter Spectra of F-Theory MSSMs 2104.08297
  • Root Bundles and Towards Exact Matter Spectra of F-theory MSSMs 2102.10115

Date: 24 September 2021, 1.30 - 3.00 pm
Location: Å80121 or Zoom https://uu-se.zoom.us/u/cdKP2PSxK5

Senast uppdaterad: 2022-06-13