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Theory Lectures by Young Researchers - ThLYR 2022
from
Monday, April 4, 2022 (9:00 AM)
to
Saturday, December 31, 2022 (6:00 PM)
Monday, April 4, 2022
10:00 AM
An Introduction to Quantum Computing for Lattice Quantum Field Theory - I
-
Giuseppe Clemente
(
DESY Zeuthen
)
An Introduction to Quantum Computing for Lattice Quantum Field Theory - I
Giuseppe Clemente
(
DESY Zeuthen
)
10:00 AM - 12:00 PM
Room: Zoom Room
Classical state-of-the-art 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.
Tuesday, April 5, 2022
10:00 AM
An Introduction to Quantum Computing for Lattice Quantum Field Theory - II
-
Giuseppe Clemente
(
DESY Zeuthen
)
An Introduction to Quantum Computing for Lattice Quantum Field Theory - II
Giuseppe Clemente
(
DESY Zeuthen
)
10:00 AM - 12:00 PM
Room: Zoom Room
Classical state-of-the-art 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.
Wednesday, April 6, 2022
Thursday, April 7, 2022
Friday, April 8, 2022
Saturday, April 9, 2022
Sunday, April 10, 2022
Monday, April 11, 2022
Tuesday, April 12, 2022
Wednesday, April 13, 2022
Thursday, April 14, 2022
Friday, April 15, 2022
Saturday, April 16, 2022
Sunday, April 17, 2022
Monday, April 18, 2022
Tuesday, April 19, 2022
Wednesday, April 20, 2022
Thursday, April 21, 2022
Friday, April 22, 2022
Saturday, April 23, 2022
Sunday, April 24, 2022
Monday, April 25, 2022
Tuesday, April 26, 2022
2:30 PM
Techniques for statistical analysis of cosmological data - (Lecture 1 of 2)
-
Fabrizio Renzi
(
Leiden University
)
Techniques for statistical analysis of cosmological data - (Lecture 1 of 2)
Fabrizio Renzi
(
Leiden University
)
2:30 PM - 4:30 PM
Room: Zoom Room
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 low-redshift (late-time) cosmological data to bound the Hubble parameter and discuss the results in view of the current literature on the Hubble tension.
Wednesday, April 27, 2022
10:30 AM
Techniques for statistical analysis of cosmological data - (Lecture 2 of 2)
-
Fabrizio Renzi
(
Leiden University
)
Techniques for statistical analysis of cosmological data - (Lecture 2 of 2)
Fabrizio Renzi
(
Leiden University
)
10:30 AM - 12:30 PM
Room: Zoom Room
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 low-redshift (late-time) cosmological data to bound the Hubble parameter and discuss the results in view of the current literature on the Hubble tension.
Thursday, April 28, 2022
Friday, April 29, 2022
Saturday, April 30, 2022
Sunday, May 1, 2022
Monday, May 2, 2022
Tuesday, May 3, 2022
Wednesday, May 4, 2022
Thursday, May 5, 2022
10:30 AM
An introduction to tensor models: from random geometry to melonic CFTs - (Lecture 1 of 2)
-
Sabine Harribey
(
Ecole Polytechnique, CPHT and U. Heidelberg, ITP
)
An introduction to tensor models: from random geometry to melonic CFTs - (Lecture 1 of 2)
Sabine Harribey
(
Ecole Polytechnique, CPHT and U. Heidelberg, ITP
)
10:30 AM - 12:30 PM
Room: Zoom Room
Tensor models are particularly interesting due to their melonic large-$N$ limit which is richer than the large-$N$ 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 Sachdev-Ye-Kitaev model without disorder. Finally, they were generalized in higher dimensions as toy models for strongly-coupled 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 large-$N$ expansion of matrix models, I will introduce tensor models and derive their melonic large-$N$ 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 long-range $O(N)^3$ model giving rise at large $N$ to a unitary CFT in the infrared.
Friday, May 6, 2022
10:30 AM
An introduction to tensor models: from random geometry to melonic CFTs - (Lecture 2 of 2)
-
Sabine Harribey
(
Ecole Polytechnique, CPHT and U. Heidelberg, ITP
)
An introduction to tensor models: from random geometry to melonic CFTs - (Lecture 2 of 2)
Sabine Harribey
(
Ecole Polytechnique, CPHT and U. Heidelberg, ITP
)
10:30 AM - 12:30 PM
Room: Zoom Room
Tensor models are particularly interesting due to their melonic large-$N$ limit which is richer than the large-$N$ 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 Sachdev-Ye-Kitaev model without disorder. Finally, they were generalized in higher dimensions as toy models for strongly-coupled 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 large-$N$ expansion of matrix models, I will introduce tensor models and derive their melonic large-$N$ 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 long-range $O(N)^3$ model giving rise at large $N$ to a unitary CFT in the infrared.
Saturday, May 7, 2022
Sunday, May 8, 2022
Monday, May 9, 2022
Tuesday, May 10, 2022
Wednesday, May 11, 2022
10:00 AM
Modern Non-Perturbative Techniques in QFT - Lecture 1
-
Karateev Denis
(
University of Geneva
)
Modern Non-Perturbative Techniques in QFT - Lecture 1
Karateev Denis
(
University of Geneva
)
10:00 AM - 12:30 PM
Room: Zoom Room
I will define quantum field theories (QFTs) Non-Perturbatively and discuss their observables. I will review modern techniques, such as the Conformal and S-matrix Bootstrap, which allow to bound the space of consistent QFTs and, in particular cases, even to compute some observables.
Thursday, May 12, 2022
10:00 AM
Modern Non-Perturbative Techniques in QFT - Lecture 2
-
Karateev Denis
(
University of Geneva
)
Modern Non-Perturbative Techniques in QFT - Lecture 2
Karateev Denis
(
University of Geneva
)
10:00 AM - 12:30 PM
Room: Zoom Room
I will define quantum field theories (QFTs) Non-Perturbatively and discuss their observables. I will review modern techniques, such as the Conformal and S-matrix Bootstrap, which allow to bound the space of consistent QFTs and, in particular cases, even to compute some observables.
Friday, May 13, 2022
Saturday, May 14, 2022
Sunday, May 15, 2022
Monday, May 16, 2022
Tuesday, May 17, 2022
Wednesday, May 18, 2022
Thursday, May 19, 2022
Friday, May 20, 2022
Saturday, May 21, 2022
Sunday, May 22, 2022
Monday, May 23, 2022
Tuesday, May 24, 2022
Wednesday, May 25, 2022
Thursday, May 26, 2022
Friday, May 27, 2022
Saturday, May 28, 2022
Sunday, May 29, 2022
Monday, May 30, 2022
Tuesday, May 31, 2022
11:00 AM
Density functionals in nuclear systems
-
Chiranjib Mondal
(
Université de Caen Normandie
)
Density functionals in nuclear systems
Chiranjib Mondal
(
Université de Caen Normandie
)
11:00 AM - 1:00 PM
Room: Zoom Room
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.
Wednesday, June 1, 2022
Thursday, June 2, 2022
Friday, June 3, 2022
11:00 AM
Density functionals in nuclear systems
-
Chiranjib Mondal
(
Université de Caen Normandie
)
Density functionals in nuclear systems
Chiranjib Mondal
(
Université de Caen Normandie
)
11:00 AM - 1:00 PM
Room: Zoom Room
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.
Saturday, June 4, 2022
Sunday, June 5, 2022
Monday, June 6, 2022
Tuesday, June 7, 2022
Wednesday, June 8, 2022
Thursday, June 9, 2022
Friday, June 10, 2022
Saturday, June 11, 2022
Sunday, June 12, 2022
Monday, June 13, 2022
Tuesday, June 14, 2022
Wednesday, June 15, 2022
8:00 AM
A Graph-Theoretic Approach to Free-Fermion Solvability
-
Adrian Chapman
(
Oxford
)
A Graph-Theoretic Approach to Free-Fermion Solvability
Adrian Chapman
(
Oxford
)
8:00 AM - 10:00 AM
Room: Zoom Room
Abstract: The Jordan-Wigner transformation represents a profound connection between the physics of many-body spin systems and the physics of fermionic systems. In the setting where the effective fermions are noninteracting, the Jordan-Wigner transformation gives an exact solution method for an otherwise apparently complicated spin model. I will describe a graph-theoretic framework which captures mappings to free fermions under a unified characterization, yielding new exact solutions to spin models. Remarkably, the relationships between exact-solution methods in this framework reflect the relationships between families of graphs. This suggests a promising approach to understanding the physics of many-body spin models through graph theory.
Thursday, June 16, 2022
Friday, June 17, 2022
8:00 AM
A Graph-Theoretic Approach to Free-Fermion Solvability
-
Adrian Chapman
(
Oxford
)
A Graph-Theoretic Approach to Free-Fermion Solvability
Adrian Chapman
(
Oxford
)
8:00 AM - 10:00 AM
Room: Zoom Room
Abstract: The Jordan-Wigner transformation represents a profound connection between the physics of many-body spin systems and the physics of fermionic systems. In the setting where the effective fermions are noninteracting, the Jordan-Wigner transformation gives an exact solution method for an otherwise apparently complicated spin model. I will describe a graph-theoretic framework which captures mappings to free fermions under a unified characterization, yielding new exact solutions to spin models. Remarkably, the relationships between exact-solution methods in this framework reflect the relationships between families of graphs. This suggests a promising approach to understanding the physics of many-body spin models through graph theory.
Saturday, June 18, 2022
Sunday, June 19, 2022
Monday, June 20, 2022
Tuesday, June 21, 2022
Wednesday, June 22, 2022
Thursday, June 23, 2022
Friday, June 24, 2022
Saturday, June 25, 2022
Sunday, June 26, 2022
Monday, June 27, 2022
Tuesday, June 28, 2022
2:00 PM
The frontier of feebly interacting particles: from dark matter to the muon (g-2)
-
Luc Darmé
(
IP2I
)
The frontier of feebly interacting particles: from dark matter to the muon (g-2)
Luc Darmé
(
IP2I
)
2:00 PM - 4:00 PM
Room: Zoom Room
New light but Feebly Interacting Particles (FIPs) represent an exciting and well-motivated 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 well-grounded 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 searched-for members. The links between FIPs and the dark matter problem will be explored, along with their potential in explaining various low-energy experimental anomalies, including the measured anomalous magnetic moment.
Wednesday, June 29, 2022
Thursday, June 30, 2022
Friday, July 1, 2022
2:00 PM
The frontier of feebly interacting particles: from dark matter to the muon (g-2)
-
Luc Darmé
(
IP2I
)
The frontier of feebly interacting particles: from dark matter to the muon (g-2)
Luc Darmé
(
IP2I
)
2:00 PM - 4:00 PM
Room: Zoom Room
New light but Feebly Interacting Particles (FIPs) represent an exciting and well-motivated 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 well-grounded 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 searched-for members. The links between FIPs and the dark matter problem will be explored, along with their potential in explaining various low-energy experimental anomalies, including the measured anomalous magnetic moment.
Saturday, July 2, 2022
Sunday, July 3, 2022
Monday, July 4, 2022
Tuesday, July 5, 2022
Wednesday, July 6, 2022
Thursday, July 7, 2022
Friday, July 8, 2022
Saturday, July 9, 2022
Sunday, July 10, 2022
Monday, July 11, 2022
Tuesday, July 12, 2022
Wednesday, July 13, 2022
Thursday, July 14, 2022
Friday, July 15, 2022
Saturday, July 16, 2022
Sunday, July 17, 2022
Monday, July 18, 2022
Tuesday, July 19, 2022
Wednesday, July 20, 2022
Thursday, July 21, 2022
Friday, July 22, 2022
Saturday, July 23, 2022
Sunday, July 24, 2022
Monday, July 25, 2022
Tuesday, July 26, 2022
Wednesday, July 27, 2022
Thursday, July 28, 2022
Friday, July 29, 2022
Saturday, July 30, 2022
Sunday, July 31, 2022
Monday, August 1, 2022
Tuesday, August 2, 2022
Wednesday, August 3, 2022
Thursday, August 4, 2022
Friday, August 5, 2022
Saturday, August 6, 2022
Sunday, August 7, 2022
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Wednesday, August 10, 2022
Thursday, August 11, 2022
Friday, August 12, 2022
Saturday, August 13, 2022
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Friday, August 26, 2022
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Wednesday, September 28, 2022
Thursday, September 29, 2022
Friday, September 30, 2022
Saturday, October 1, 2022
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Wednesday, October 5, 2022
Thursday, October 6, 2022
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Tuesday, November 1, 2022
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Thursday, November 24, 2022
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Sunday, November 27, 2022
Monday, November 28, 2022
Tuesday, November 29, 2022
Wednesday, November 30, 2022
Thursday, December 1, 2022
Friday, December 2, 2022
Saturday, December 3, 2022
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Wednesday, December 7, 2022
Thursday, December 8, 2022
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Monday, December 26, 2022
Tuesday, December 27, 2022
Wednesday, December 28, 2022
Thursday, December 29, 2022
Friday, December 30, 2022
Saturday, December 31, 2022
