Theory Lectures by Young Researchers - ThLYR 2022
da
lunedì 4 aprile 2022(09:00)
a
sabato 31 dicembre 2022(18:00)
lunedì 4 aprile 2022
10:00
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 - 12:00
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.
martedì 5 aprile 2022
10:00
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 - 12:00
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.
mercoledì 6 aprile 2022
giovedì 7 aprile 2022
venerdì 8 aprile 2022
sabato 9 aprile 2022
domenica 10 aprile 2022
lunedì 11 aprile 2022
martedì 12 aprile 2022
mercoledì 13 aprile 2022
giovedì 14 aprile 2022
venerdì 15 aprile 2022
sabato 16 aprile 2022
domenica 17 aprile 2022
lunedì 18 aprile 2022
martedì 19 aprile 2022
mercoledì 20 aprile 2022
giovedì 21 aprile 2022
venerdì 22 aprile 2022
sabato 23 aprile 2022
domenica 24 aprile 2022
lunedì 25 aprile 2022
martedì 26 aprile 2022
14:30
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
)
14:30 - 16:30
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.
mercoledì 27 aprile 2022
10:30
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 - 12:30
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.
giovedì 28 aprile 2022
venerdì 29 aprile 2022
sabato 30 aprile 2022
domenica 1 maggio 2022
lunedì 2 maggio 2022
martedì 3 maggio 2022
mercoledì 4 maggio 2022
giovedì 5 maggio 2022
10:30
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 - 12:30
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.
venerdì 6 maggio 2022
10:30
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 - 12:30
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.
sabato 7 maggio 2022
domenica 8 maggio 2022
lunedì 9 maggio 2022
martedì 10 maggio 2022
mercoledì 11 maggio 2022
10:00
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 - 12:30
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.
giovedì 12 maggio 2022
10:00
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 - 12:30
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.
venerdì 13 maggio 2022
sabato 14 maggio 2022
domenica 15 maggio 2022
lunedì 16 maggio 2022
martedì 17 maggio 2022
mercoledì 18 maggio 2022
giovedì 19 maggio 2022
venerdì 20 maggio 2022
sabato 21 maggio 2022
domenica 22 maggio 2022
lunedì 23 maggio 2022
martedì 24 maggio 2022
mercoledì 25 maggio 2022
giovedì 26 maggio 2022
venerdì 27 maggio 2022
sabato 28 maggio 2022
domenica 29 maggio 2022
lunedì 30 maggio 2022
martedì 31 maggio 2022
11:00
Density functionals in nuclear systems
-
Chiranjib Mondal
(
Université de Caen Normandie
)
Density functionals in nuclear systems
Chiranjib Mondal
(
Université de Caen Normandie
)
11:00 - 13:00
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.
mercoledì 1 giugno 2022
giovedì 2 giugno 2022
venerdì 3 giugno 2022
11:00
Density functionals in nuclear systems
-
Chiranjib Mondal
(
Université de Caen Normandie
)
Density functionals in nuclear systems
Chiranjib Mondal
(
Université de Caen Normandie
)
11:00 - 13:00
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.
sabato 4 giugno 2022
domenica 5 giugno 2022
lunedì 6 giugno 2022
martedì 7 giugno 2022
mercoledì 8 giugno 2022
giovedì 9 giugno 2022
venerdì 10 giugno 2022
sabato 11 giugno 2022
domenica 12 giugno 2022
lunedì 13 giugno 2022
martedì 14 giugno 2022
mercoledì 15 giugno 2022
08:00
A Graph-Theoretic Approach to Free-Fermion Solvability
-
Adrian Chapman
(
Oxford
)
A Graph-Theoretic Approach to Free-Fermion Solvability
Adrian Chapman
(
Oxford
)
08:00 - 10:00
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.
giovedì 16 giugno 2022
venerdì 17 giugno 2022
08:00
A Graph-Theoretic Approach to Free-Fermion Solvability
-
Adrian Chapman
(
Oxford
)
A Graph-Theoretic Approach to Free-Fermion Solvability
Adrian Chapman
(
Oxford
)
08:00 - 10:00
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.
sabato 18 giugno 2022
domenica 19 giugno 2022
lunedì 20 giugno 2022
martedì 21 giugno 2022
mercoledì 22 giugno 2022
giovedì 23 giugno 2022
venerdì 24 giugno 2022
sabato 25 giugno 2022
domenica 26 giugno 2022
lunedì 27 giugno 2022
martedì 28 giugno 2022
14:00
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
)
14:00 - 16:00
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.
mercoledì 29 giugno 2022
giovedì 30 giugno 2022
venerdì 1 luglio 2022
14:00
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
)
14:00 - 16:00
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.
sabato 2 luglio 2022
domenica 3 luglio 2022
lunedì 4 luglio 2022
martedì 5 luglio 2022
mercoledì 6 luglio 2022
giovedì 7 luglio 2022
venerdì 8 luglio 2022
sabato 9 luglio 2022
domenica 10 luglio 2022
lunedì 11 luglio 2022
martedì 12 luglio 2022
mercoledì 13 luglio 2022
giovedì 14 luglio 2022
venerdì 15 luglio 2022
sabato 16 luglio 2022
domenica 17 luglio 2022
lunedì 18 luglio 2022
martedì 19 luglio 2022
mercoledì 20 luglio 2022
giovedì 21 luglio 2022
venerdì 22 luglio 2022
sabato 23 luglio 2022
domenica 24 luglio 2022
lunedì 25 luglio 2022
martedì 26 luglio 2022
mercoledì 27 luglio 2022
giovedì 28 luglio 2022
venerdì 29 luglio 2022
sabato 30 luglio 2022
domenica 31 luglio 2022
lunedì 1 agosto 2022
martedì 2 agosto 2022
mercoledì 3 agosto 2022
giovedì 4 agosto 2022
venerdì 5 agosto 2022
sabato 6 agosto 2022
domenica 7 agosto 2022
lunedì 8 agosto 2022
martedì 9 agosto 2022
mercoledì 10 agosto 2022
giovedì 11 agosto 2022
venerdì 12 agosto 2022
sabato 13 agosto 2022
domenica 14 agosto 2022
lunedì 15 agosto 2022
martedì 16 agosto 2022
mercoledì 17 agosto 2022
giovedì 18 agosto 2022
venerdì 19 agosto 2022
sabato 20 agosto 2022
domenica 21 agosto 2022
lunedì 22 agosto 2022
martedì 23 agosto 2022
mercoledì 24 agosto 2022
giovedì 25 agosto 2022
venerdì 26 agosto 2022
sabato 27 agosto 2022
domenica 28 agosto 2022
lunedì 29 agosto 2022
martedì 30 agosto 2022
mercoledì 31 agosto 2022
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martedì 1 novembre 2022
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sabato 31 dicembre 2022