
Yuan Miao (Kavli Japan)
A (biased) introduction to sixvertex model

10 Jan 2024  10:00
"Sixvertex model is an archetypical model in statistical mechanics that pertains exact solutions. It is also related to highenergy physics, combinatorics, probability, etc. I will explain the definition of the model, and its YangBaxter integrability. As an exercise, I will demonstrate the IzerginKorepin determinant for the sixvertex model with domainwall boundary condition that leads to a beautiful proof on the ASM conjecture in combinatorics."

Poster

Video



Andrea Antinucci (SISSA)
"A Holographic View on Symmetry”

05 Dec 2023  14:30
The aim of this lecture is to introduce, from an elementary bottomup approach, a modern viewpoint on global finite symmetries in QFT_d, utilizing a (d+1)dimensional Topological Quantum Field Theory (TQFT). To do so, in the first part I will elucidate several concepts on generalized global symmetries, clarifying that a subset of them can be understood in very elementary way precisely as ordinary global symmetries found in textbooks. I will briefly explain why the most general notion of (non)symmetries is described mathematically by some kind of higher fusion category. In the second part, I will explain the holographic viewpoint, which enables the study of these complicated algebraic structures in terms of often simpler TQFTs in one dimension higher. If time permits I will describe how anomalies of generalized symmetries are encoded in this framework and how they can be employed to constraint the dynamics

Poster

Video



Francesco Costa (University of Goettingen)
Freezein Dark Matter: Problems and Opportunities

20 Oct 2023  14:30
Abstract
FIMP dark matter is produced via the freezein mechanism, which implies tiny couplings between the DM and the standard model particles. We will discuss the motivation behind FIMP dark matter and will study simple models of FIMPs. We will compare them with standard thermal freezeout production, analyse the model predictions and possible observable signatures. In the second part of the lecture, we will consider the assumptions behind the freezein production mechanism and its shortcomings. Finally, we will discuss new avenues and connections to others beyond the standard model open problems.

Poster




Valentin Benedetti
Generalized Symmetries, Noether currents, and the ABJ anomaly

10 Oct 2023  14:00
We will study how the presence of generalized symmetries in a theory is related, from a local QFT point of view to the emergence of Haag duality violating (HDV) operator classes. In this context, we explain that if the nonlocal operators associated with the generalized symmetries transform under the action of a continuous global symmetry group then there cannot be a welldefined Noether current for such a group. We will show how this result can be used to rederive WeinbergWitten theorem within local QFT, where we will explicitly discuss the example of linearized gravitons. Furthermore, generalized symmetries that are charged under a continuous global symmetry, must be generated by a continuous of noncommuting dual HDV classes. If the HDV classes form a noncompact group, then we find that a theory with an unbroken noncompact higherform symmetry is necessarily massless and free. However, if the HDV group is compact, the presence of charged classes seems compatible with an interacting QFT. In this case, the prototypical example is the chiral symmetry in QFT violated by the presence of the AdlerBellJackiw anomaly. We will show how to understand the anomaly as a full abelian U(1) symmetry generated by a nongaugeinvariant Noether current. This entails the construction of the U(1) symmetry transformations for arbitrary, topologically nontrivial, spacetime regions, and showing they can transform the nonlocal charges.


Video



Níckolas de Aguiar Alves
Why Do Things Fall? An Introduction to Quantum Field Theory in Curved Spacetime

22 Sep 2023  14:00
Some questions about the Universe are so profound that we have spent thousands of years wondering about them without reaching a satisfactory conclusion. One of them is to understand "why do things fall?". In this lecture, I shall discuss one of our most successful answers to that question: quantum field theory in curved spacetime. I shall describe what are its purposes, limitations, and historical achievements

Poster

Video



Suvajit Majumder
Machinelearning quantum integrability: searching for new Rmatrices

28 Jun 2023  11:00
We kick off the ThLYR season on June 21st with Suvajit Majumder, a guest speaker from the City University of London, who will talk about "Machinelearning quantum integrability: searching for new Rmatrices". We look forward to welcoming many of you.

Poster

Video



Luc Darmé (IP2I)
The frontier of feebly interacting particles: from dark matter to the muon (g2)  Lecture II

01 Jul 2022  14:00
New light but Feebly Interacting Particles (FIPs) represent an
exciting and wellmotivated class of new physics particles.
FIPs are loosely defined as (1) singlets under the Standard
Model (SM) gauge groups; (2) lighter than the electroweak
scale and (3) not yet excluded or discovered.
Many wellgrounded new physics candidates fit this
definition, with extremely bright experimental prospects for
FIPs in the MeV and GeV mass range.
In these lectures, we will present the theoretical foundations
of this family of new physics particles and introduce some of
its most searchedfor members. The links between FIPs and
the dark matter problem will be explored, along with their
potential in explaining various lowenergy experimental
anomalies, including the measured anomalous magnetic
moment.


Video



Luc Darmé (IP2I)
The frontier of feebly interacting particles: from dark matter to the muon (g2)  Lecture I

28 Jun 2022  14:00
New light but Feebly Interacting Particles (FIPs) represent an
exciting and wellmotivated class of new physics particles.
FIPs are loosely defined as (1) singlets under the Standard
Model (SM) gauge groups; (2) lighter than the electroweak
scale and (3) not yet excluded or discovered.
Many wellgrounded new physics candidates fit this
definition, with extremely bright experimental prospects for
FIPs in the MeV and GeV mass range.
In these lectures, we will present the theoretical foundations
of this family of new physics particles and introduce some of
its most searchedfor members. The links between FIPs and
the dark matter problem will be explored, along with their
potential in explaining various lowenergy experimental
anomalies, including the measured anomalous magnetic
moment.


Video



Adrian Chapman (U. Oxford)
A GraphTheoretic Approach to FreeFermion Solvability  Lecture II

17 Jun 2022  08:00
Abstract: The JordanWigner transformation represents a profound connection between the physics of manybody spin systems and the physics of fermionic systems. In the setting where the effective fermions are noninteracting, the JordanWigner transformation gives an exact solution method for an otherwise apparently complicated spin model. I will describe a graphtheoretic framework which captures mappings to free fermions under a unified characterization, yielding new exact solutions to spin models. Remarkably, the relationships between exactsolution methods in this framework reflect the relationships between families of graphs. This suggests a promising approach to understanding the physics of manybody spin models through graph theory.


Video



Adrian Chapman (Oxford)
A GraphTheoretic Approach to FreeFermion Solvability  Lecture I

15 Jun 2022  08:00
Abstract: The JordanWigner transformation represents a profound connection between the physics of manybody spin systems and the physics of fermionic systems. In the setting where the effective fermions are noninteracting, the JordanWigner transformation gives an exact solution method for an otherwise apparently complicated spin model.
I will describe a graphtheoretic framework which captures mappings to free fermions under a unified characterization, yielding new exact solutions to spin models. Remarkably, the relationships between exactsolution methods in this framework reflect the relationships between families of graphs. This suggests a promising approach to understanding the physics of manybody spin models through graph theory.


Video



Chiranjib Mondal (Université de Caen Normandie)
Density functionals in nuclear systems  Lecture II

03 Jun 2022  11:00
In these two lectures, I will give a general overview of density functional theory (DFT) in nuclear systems. We will discuss the basic ingredients of the theory in terms of similarities and (of course) differences with an electronic system. We will discuss further, with an illustrating example, how to find the ground state properties of a simple nucleus and properties of infinite nuclear matter. We will end the discussion with constructing an energy density functional (EDF) which is cost effective, agnostic yet informed by nuclear properties, suitable for astrophysical calculations.

Poster




Chiranjib Mondal (Université de Caen Normandie)
Density functionals in nuclear systems  Lecture I

31 May 2022  11:00
In these two lectures, I will give a general overview of density functional theory (DFT) in nuclear systems. We will discuss the basic ingredients of the theory in terms of similarities and (of course) differences with an electronic system. We will discuss further, with an illustrating example, how to find the ground state properties of a simple nucleus and properties of infinite nuclear matter. We will end the discussion with constructing an energy density functional (EDF) which is cost effective, agnostic yet informed by nuclear properties, suitable for astrophysical calculations.

Poster




Denis Karateev (University of Geneva)
Modern NonPerturbative Techniques in QFT  Second lecture

12 May 2022  10:00
I will define quantum field theories (QFTs) NonPerturbatively and discuss their observables. I will review modern techniques, such as the Conformal and Smatrix Bootstrap, which allow to bound the space of consistent QFTs and, in particular cases, even to compute some observables.

Poster

Video



Denis Karateev (University of Geneva)
Modern NonPerturbative Techniques in QFT  First lecture

11 May 2022  10:00
I will define quantum field theories (QFTs) NonPerturbatively and discuss their observables. I will review modern techniques, such as the Conformal and Smatrix Bootstrap, which allow to bound the space of consistent QFTs and, in particular cases, even to compute some observables.
Slides

Poster

Video



Sabine Harribey (Ecole Polytechnique, CPHT and U. Heidelberg, ITP)
An introduction to tensor models: from random geometry to melonic CFTs  Lecture I

06 May 2022  10:30
Tensor models are particularly interesting due to their melonic largeN limit which is richer than the largeN limit of vector models but simpler than the planar limit of matrix models. Tensor models were first introduced in zero dimension in the context of random geometry and quantum gravity. They were then extended to quantum mechanical models in one dimension as an alternative to the SachdevYeKitaev model without disorder. Finally, they were generalized in higher dimensions as toy models for stronglycoupled QFTs. In this context, they give rise in the infrared to a new kind of conformal field theories analytically accessible, called melonic CFTs.
In these lectures, after reviewing the largeN expansion of matrix models, I will introduce tensor models and derive their melonic largeN limit. In both cases, I will present some applications to random geometry and quantum gravity. The second part of the lectures will focus on melonic CFTs. In particular, I will review the bosonic longrange 0(N)3 model giving rise at large N to a unitary CFT in the infrared.
Slides


Video



Sabine Harribey (Ecole Polytechnique, CPHT and U. Heidelberg, ITP)
An introduction to tensor models: from random geometry to melonic CFTs  Lecture I

05 May 2022  10:30
Tensor models are particularly interesting due to their melonic largeN limit which is richer than the largeN limit of vector models but simpler than the planar limit of matrix models. Tensor models were first introduced in zero dimension in the context of random geometry and quantum gravity. They were then extended to quantum mechanical models in one dimension as an alternative to the SachdevYeKitaev model without disorder. Finally, they were generalized in higher dimensions as toy models for stronglycoupled QFTs. In this context, they give rise in the infrared to a new kind of conformal field theories analytically accessible, called melonic CFTs.
In these lectures, after reviewing the largeN expansion of matrix models, I will introduce tensor models and derive their melonic largeN limit. In both cases, I will present some applications to random geometry and quantum gravity. The second part of the lectures will focus on melonic CFTs. In particular, I will review the bosonic longrange 0(N)3 model giving rise at large N to a unitary CFT in the infrared.
Slides


Video



Fabrizio Renzi (Leiden University)
Techniques for statistical analysis of cosmological data  Lecture II

27 Apr 2022  10:30
Analyzing data is an interplay between modeling physical theories and using complex statistical inference to extract unbiased information from the data themselves. In the era of precision cosmology, data analysis has become a key tool for the falsification of cosmological theories and for the quest of finding new physical effects not predicted by our current modelization of the Universe.
Inevitably, many biases are introduced, willingly or not, in the procedure of extracting information from data since our theories are incomplete and our statistical inference is not perfect. Such biases could lead to wrong physical conclusions and particular care is required in deriving answers that are as free as possible from those biases.
In this series of two lectures, I will give an introduction to Monte Carlo Markov Chain (MCMC) and Machine Learning (ML) techniques for the inference of cosmological parameters. I will discuss their advantages and disadvantages and show how they can be used to gain accurate information about our Universe.
The first lecture will be dedicated to introducing the building blocks of statistical inference. Starting from the simplest example of fitting a linear model to data, I will introduce the main concepts behind the construction of MCMC and ML methods and show how to use them with real examples.
The second lecture will be dedicated to learning to use these methodologies to analyze real cosmological data and derive constraints on cosmological parameters. In particular, I will show the use of lowredshift (latetime) cosmological data to bound the Hubble parameter and discuss the results in view of the current literature on the Hubble tension.

Poster

Video



Fabrizio Renzi (Leiden University)
Techniques for statistical analysis of cosmological data  Lecture I

26 Apr 2022  14:30
Analyzing data is an interplay between modeling physical theories and using complex statistical inference to extract unbiased information from the data themselves. In the era of precision cosmology, data analysis has become a key tool for the falsification of cosmological theories and for the quest of finding new physical effects not predicted by our current modelization of the Universe.
Inevitably, many biases are introduced, willingly or not, in the procedure of extracting information from data since our theories are incomplete and our statistical inference is not perfect. Such biases could lead to wrong physical conclusions and particular care is required in deriving answers that are as free as possible from those biases.
In this series of two lectures, I will give an introduction to Monte Carlo Markov Chain (MCMC) and Machine Learning (ML) techniques for the inference of cosmological parameters. I will discuss their advantages and disadvantages and show how they can be used to gain accurate information about our Universe.
The first lecture will be dedicated to introducing the building blocks of statistical inference. Starting from the simplest example of fitting a linear model to data, I will introduce the main concepts behind the construction of MCMC and ML methods and show how to use them with real examples.
The second lecture will be dedicated to learning to use these methodologies to analyze real cosmological data and derive constraints on cosmological parameters. In particular, I will show the use of lowredshift (latetime) cosmological data to bound the Hubble parameter and discuss the results in view of the current literature on the Hubble tension.

Poster

Video



Giuseppe Clemente (DESY Zeuthen)
An Introduction to Quantum Computing for Lattice Quantum Field Theory  Lecture II

05 Apr 2022  10:00
Classical stateoftheart numerical techniques have pushed the measurements of quantities of interest for Lattice Quantum Field Theories to unprecedented degrees of accuracy. However, these techniques have limitations and some problems are still difficult to investigate. As Feynman noticed decades ago, quantum computation presents itself as a more natural setting to study the physics of quantum systems; as quantum computers and quantum technologies are improving from year to year, quantum computation techniques are becoming increasingly important tools in the theoretical physicist's toolkit. In these lectures I will first give a broad introduction to the fundamentals of quantum computing, discussing some of the main algorithms and applications. Then, I will discuss some of the most promising quantum computing techniques for solving Lattice Quantum Field Theory problems in regimes where classical methods cannot be applied or are especially expensive from the computational point of view.

Poster




Giuseppe Clemente (DESY Zeuthen)
An Introduction to Quantum Computing for Lattice Quantum Field Theory  Lecture I

04 Apr 2022  10:00
Classical stateoftheart numerical techniques have pushed the measurements of quantities of interest for Lattice Quantum Field Theories to unprecedented degrees of accuracy. However, these techniques have limitations and some problems are still difficult to investigate. As Feynman noticed decades ago, quantum computation presents itself as a more natural setting to study the physics of quantum systems; as quantum computers and quantum technologies are improving from year to year, quantum computation techniques are becoming increasingly important tools in the theoretical physicist's toolkit. In these lectures I will first give a broad introduction to the fundamentals of quantum computing, discussing some of the main algorithms and applications. Then, I will discuss some of the most promising quantum computing techniques for solving Lattice Quantum Field Theory problems in regimes where classical methods cannot be applied or are especially expensive from the computational point of view.

Poster




Daniele Bertacca (Dipartimento di Fisica e Astronomia G. Galilei, Università degli studi di Padova)
Introduction on relativistic projection effects on cosmological scales

10 Dec 2021  10:00
Upcoming surveys will probe increasingly large scales, approaching and even exceeding the Hubble scale at the survey redshifts. On these cosmological scales, surveys can in principle provide the best constraints on dark energy and modified gravity models – and will be able to test general relativity itself. In order to realise the potential of these surveys, we need to ensure that we are using a correct analysis, i.e. a general relativistic analysis, on cosmological scales. In the first part of this lecture I will make a general overview of my research related to these effects both for the galaxy clustering and for the GWs. Then I will analyse in detail the relativistic effects which alter the observed number overdensity through projection onto our past lightcone. This gives the wellknown corrections from redshift space distortions and gravitational lensing convergence, but there are further Doppler, SachsWolfe, integrated SW and timedelay type terms.

Poster




Adriano Viganò (Università di Milano)
Solution generation techniques in gravitational theories  Lecture II

26 Nov 2021  11:00
The construction of exact solutions in gravitational theories, from black holes to cosmological solutions, is of great interest. In these lectures, we will give an overview of the solution generation techniques in the realm of gravitational theories by focusing on two of them: the Ernst formalism and the inverse scattering method.
In both cases, we will explicitly construct the integration scheme for the equations of motion and we will apply it to some relevant examples of black hole physics.
Slides

Poster




Adriano Viganò (Università di Milano)
Solution generation techniques in gravitational theories – Lecture I

25 Nov 2021  11:00
The construction of exact solutions in gravitational theories, from black holes to cosmological solutions, is of great interest. In these lectures, we will give an overview of the solution generation techniques in the realm of gravitational theories by focusing on two of them: the Ernst formalism and the inverse scattering method.
In both cases, we will explicitly construct the integration scheme for the equations of motion and we will apply it to some relevant examples of black hole physics.
Slides

Poster




Carlos Duaso Pueyo (University of Amsterdam)
Bootstrapping Cosmological Fluctuations – Lecture 2

16 Nov 2021  15:00
Reconstructing the physics of the very early universe from current observations is one of the most exciting challenges of theoretical cosmology. The main objects of interest in this context are correlation functions of perturbations on the spatial slice sitting at the end of inflation. In these lectures I will review a new approach—the "cosmological bootstrap"—that attempts to derive these correlators without making reference to the inflationary time evolution. The aim is to directly fix them at the boundary where they reside by using symmetries and elementary physical principles. This new point of view is helping us bridge the gap between theory and observations and is providing new insights into the physics of inflation and de Sitter space.
Slides

Poster

Video



Carlos Duaso Pueyo (University of Amsterdam)
Bootstrapping Cosmological Fluctuations – Lecture 1

15 Nov 2021  15:00
Reconstructing the physics of the very early universe from current observations is one of the most exciting challenges of theoretical cosmology. The main objects of interest in this context are correlation functions of perturbations on the spatial slice sitting at the end of inflation. In these lectures I will review a new approach—the "cosmological bootstrap"—that attempts to derive these correlators without making reference to the inflationary time evolution. The aim is to directly fix them at the boundary where they reside by using symmetries and elementary physical principles. This new point of view is helping us bridge the gap between theory and observations and is providing new insights into the physics of inflation and de Sitter space.
Slides

Poster

Video



Marco Piva  National Institute of Chemical Physics and Biophysics (NICPB), Tallin
Higherderivative quantum field theories, unitarity and quantum gravity

15 Oct 2021  10:00
These lectures aim to clarify several aspects of higherderivative quantum field theories, their issues and how to circumvent them. Special attention will be given to quantum gravity. After reviewing general definitions we discuss the role of higher derivatives in both effective field theories and fundamental ones. Focusing on the latter, we explore the class of theories suitable for quantum gravity, iscuss their features and the issues with unitarity. Finally, we show how to reconcile renormalizability and unitarity by means of purely virtual quanta.

Poster

Video



Marco Piva  National Institute of Chemical Physics and Biophysics (NICPB), Tallin
Higherderivative quantum field theories, unitarity and quantum gravity

14 Oct 2021  10:00
These lectures aim to clarify several aspects of higherderivative quantum field theories, their issues and how to circumvent them. Special attention will be given to quantum gravity. After reviewing general definitions we discuss the role of higher derivatives in both effective field theories and fundamental ones. Focusing on the latter, we explore the class of theories suitable for quantum gravity, discuss their features and the issues with unitarity. Finally, we show how to reconcile renormalizability and unitarity by means of purely virtual quanta.

Poster

Video



Lorenzo Bartolini (Henan U.)
The holographic approach to nonperturbative QCD and baryon physics – Lecture 2

14 Sep 2021  10:00
The Gauge/Gravity duality introduced a new tool for investigating QFTs in non perturbative regimes: the most phenomenologically relevant example of these theories is QCD at low energy (at the scale of nuclear physics), whose spectrum of bound states ranges from glueballs, to mesons, to complicated atomic nuclei. In these lectures we will review the Gauge/Gravity duality and discuss its extension to (almost) QCD, illustrating the topdown model of WittenSakaiSugimoto: we will show the emergence of baryons from the model, and how to use it to compute observables that can prove themselves challenging via other techniques.

Poster

Video



Lorenzo Bartolini (Henan U.)
The holographic approach to nonperturbative QCD and baryon physics – Lecture 1

13 Sep 2021  10:00
The Gauge/Gravity duality introduced a new tool for investigating QFTs in non perturbative regimes: the most phenomenologically relevant example of these theories is QCD at low energy (at the scale of nuclear physics), whose spectrum of bound states ranges from glueballs, to mesons, to complicated atomic nuclei. In these lectures we will review the Gauge/Gravity duality and discuss its extension to (almost) QCD, illustrating the topdown model of WittenSakaiSugimoto: we will show the emergence of baryons from the model, and how to use it to compute observables that can prove themselves challenging via other techniques.

Poster

Video



Davide Vadacchino (Trinity College, Dublin)
Lattice QCD: a primer of methods and results

29 Jun 2021  11:00
The lattice regularization of Quantum Field Theories is a firstprinciples approach that allows to explore their nonperturbative regime via computer simulations. Over the years, it has provided valuable inputs to experimental studies and has contributed to the understanding of some of the deepest features of stronglyinteracting field theories. The constant improvement of algorithms and computational power makes the lattice regularization an essential tool in the hands of the theoretical physicists of the future. In these lectures, the theoretical foundations of this approach will be reviewed, and some of the main results and currently open problems will be discussed.
Slides

Poster

Video



Davide Vadacchino (Trinity College, Dublin)
Lattice QCD: a primer of methods and results

28 Jun 2021  11:00
The lattice regularization of Quantum Field Theories is a firstprinciples approach that allows to explore their nonperturbative regime via computer simulations. Over the years, it has provided valuable inputs to experimental studies and has contributed to the understanding of some of the deepest features of stronglyinteracting field theories. The constant improvement of algorithms and computational power makes the lattice regularization an essential tool in the hands of the theoretical physicists of the future. In these lectures, the theoretical foundations of this approach will be reviewed, and some of the main results and currently open problems will be discussed.
Slides

Poster

Video



Angelo Ricciardone  Dipartimento di Fisica e Astronomia “G. Galilei”, Padova University
Primordial Gravitational waves and interferometers

18 Jun 2021  11:00
Gravitational Waves (GWs) represent a unique tool to explore
the physics and the microphysics of the universe. After the
GW direct detections by the LIGO/Virgo collaboration, the
next target of modern cosmology is the detection of Stochastic
Gravitational Wave Backgrounds (SGWB), both of
cosmological and astrophysical origin. In this lectures, I will
present early universe scenarios that can be probed with
future GW detectors; in particular I will show how the LISA
and Einstein Telescope (ET) interferometers, in addition to
the detection and characterization of GWs of astrophysical
origin, will give compelling information about the
cosmological background of GWs. I will discuss the main tools
and observables to deal with GW physics at interferometers.

Poster

Video



Angelo Ricciardone  Dipartimento di Fisica e Astronomia “G. Galilei”, Padova University
Primordial Gravitational waves and interferometers

17 Jun 2021  11:00
Gravitational Waves (GWs) represent a unique tool to explore
the physics and the microphysics of the universe. After the
GW direct detections by the LIGO/Virgo collaboration, the
next target of modern cosmology is the detection of Stochastic
Gravitational Wave Backgrounds (SGWB), both of
cosmological and astrophysical origin. In this lectures, I will
present early universe scenarios that can be probed with
future GW detectors; in particular I will show how the LISA
and Einstein Telescope (ET) interferometers, in addition to
the detection and characterization of GWs of astrophysical
origin, will give compelling information about the
cosmological background of GWs. I will discuss the main tools
and observables to deal with GW physics at interferometers.

Poster

Video



Sara Bonansea
Defects in conformal field theory and holography

28 May 2021  11:00
The general study of defects has relations with the physics of almost every field theory. Defects can be introduced into a conformal field theory as means to make contact with the real world, reducing the total amount of symmetry. The broken conformal symmetries relax some of the constraints put on the correlation functions and defects can be used as probes to study the dynamics of a theory. In the first part of these lectures, I will give some hints on the bootstrap program for defect conformal field theories. Furthermore, I will focus on a particular defect version of N=4 Super YangMills which has a holographic realization in terms of a D3probeD5 brane system. In this setup, I will present some particular results for local and nonlocal observables achieved with different techniques.

Poster

Video



Sara Bonansea
Defects in conformal field theory and holography

27 May 2021  11:00
The general study of defects has relations with the physics of almost every field theory. Defects can be introduced into a conformal field theory as means to make contact with the real world, reducing the total amount of symmetry. The broken conformal symmetries relax some of the constraints put on the correlation functions and defects can be used as probes to study the dynamics of a theory. In the first part of these lectures, I will give some hints on the bootstrap program for defect conformal field theories. Furthermore, I will focus on a particular defect version of N=4 Super YangMills which has a holographic realization in terms of a D3probeD5 brane system. In this setup, I will present some particular results for local and nonlocal observables achieved with different techniques.

Poster

Video



Luigi Tizzano
(Simons Center for Geometry and Physics, SUNY, Stony Brook, NY)
Aspects of Generalized Global Symmetries and Anomalies Lecture II

13 May 2021  16:00
Abstract
I will review some recent results on the dynamics of quantum field theories based on a renewed understanding of global symmetries and their anomalies.

Poster

Video



Luigi Tizzano
(Simons Center for Geometry and Physics, SUNY, Stony Brook, NY)
Aspects of Generalized Global Symmetries and Anomalies Lecture I

11 May 2021  16:00
Abstract
I will review some recent results on the dynamics of quantum field theories based on a renewed understanding of global symmetries and their anomalies.

Poster

Video



Luigi Guerrini  Università di Parma & INFN Parma
Localization of Supersymmetric gauge theories in three dimensions

30 Apr 2021  11:00
Supersymmetric Quantum Field Theories provide an exciting arena for exploring physics in the strong coupling regime. Supersymmetric localization has turned out to be a formidable tool for making progress in this direction. The goal of these lectures is to provide a concrete example of supersymmetric localization in the context of threedimensional gauge theories. I will first review the basic idea of localization in the finitedimensional case. I will then show an application of this idea to supersymmetric ChernSimons matter theories. In particular, I will explain how matrix models capture the partition function of these theories.
Slides

Poster

Video



Luigi Guerrini  Università di Parma & INFN Parma
Localization of Supersymmetric gauge theories in three dimensions

29 Apr 2021  11:00
Supersymmetric Quantum Field Theories provide an exciting arena for exploring physics in the strong coupling regime. Supersymmetric localization has turned out to be a formidable tool for making progress in this direction. The goal of these lectures is to provide a concrete example of supersymmetric localization in the context of threedimensional gauge theories. I will first review the basic idea of localization in the finitedimensional case. I will then show an application of this idea to supersymmetric ChernSimons matter theories. In particular, I will explain how matrix models capture the partition function of these theories.
Slides

Poster

Video



Paolo Benincasa  Instituto de Fisica Teorica (IFT), Madrid
Cosmology and Geometry at the Boundary  Lecture II

13 Apr 2021  11:00
Cosmological observables, such as temperature fluctuations in the CMB and density fluctuations in the distribution of galaxies, can be traced back to the end of inflation where they are encoded in quantum correlations, and the wavefunction of the universe which generates them, at a spacelike boundary of a quasidS spacetime. These lectures will focus on a novel approach to construct the wavefunction of the universe from boundary data only and extract from them physical information. We will learn about its analytic structure, the interpretation of the singularity coefficients as physical processes, including scattering processes in flatspace, as well as a firstprinciple formulation in terms of combinatorialgeometrical objects which, together to provide new computational tools, provide a window on the basic rules behind cosmological processes.

Poster

Video



Paolo Benincasa  Instituto de Fisica Teorica (IFT), Madrid
Cosmology and Geometry at the Boundary  Lecture I

12 Apr 2021  11:00
Cosmological observables, such as temperature fluctuations in the CMB and density fluctuations in the distribution of galaxies, can be traced back to the end of inflation where they are encoded in quantum correlations, and the wavefunction of the universe which generates them, at a spacelike boundary of a quasidS spacetime. These lectures will focus on a novel approach to construct the wavefunction of the universe from boundary data only and extract from them physical information. We will learn about its analytic structure, the interpretation of the singularity coefficients as physical processes, including scattering processes in flatspace, as well as a firstprinciple formulation in terms of combinatorialgeometrical objects which, together to provide new computational tools, provide a window on the basic rules behind cosmological processes.

Poster

Video



Lucrezia Ravera  Politecnico di Torino (DISAT)
Geometric Approach to Supergravity II

26 Mar 2021  11:00
Abstract
The construction of supergravity theories from the technical point of view is a nontrivial task. In particular, complications arise from the fact that fermionic representations are involved. It is therefore particularly useful to find an efficient method to deal with the technical labor in formulating supergravity theories. In these lectures we will explore the geometric (aka rheonomic) approach to supergravity theories in superspace, which allows a complete geometrical interpretation of supersymmetry.
Slides

Poster

Video



Lucrezia Ravera  Politecnico di Torino (DISAT)
Geometric Approach to Supergravity I

25 Mar 2021  11:00
Abstract
The construction of supergravity theories from the technical point of view is a nontrivial task. In particular, complications arise from the fact that fermionic representations are involved. It is therefore particularly useful to find an efficient method to deal with the technical labor in formulating supergravity theories. In these lectures we will explore the geometric (aka rheonomic) approach to supergravity theories in superspace, which allows a complete geometrical interpretation of supersymmetry.
Slides

Poster

Video

