
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




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




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




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




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




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




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

