Events calendar

Intervenant: Antoine Bourget

In the last decade, the concept of symmetry in quantum field theory has been vastly generalized, to so-called higher-form symmetries, and, more broadly, categorical symmetries, which can sometimes be non-invertible. If these statements sound weird to you, this lecture series is aimed at you.

I will introduce these generalized symmetries using the viewpoint of gauge (Maxwell and Yang-Mills) theories and anomalies, which both motivate the introduction of the new concepts and illustrate them.

Topics covered:

• Charge conservation and global symmetries in Maxwell theory
• Anomalies and higher-group symmetries
• Self-dual Yang-Mills theories and non-invertible symmetries
• Higher categories as the framework for describing symmetries

Livestream on youtube.com/IPhT-TV: no subscription required

Videoconference: subscribe to the course newsletter to receive links

We will review the beginning of experimental and theoretical studies of moiré systems and their evolution up to present. This type of systems represent a new way of “growing” materials, and has tremendous potential both for fundamental physics as well as for applications. Two dimensional periodic crystals, whose separation between atoms is of order angstroms, can be twisted controllably with respect to each other such that they form new “periodicities”, called moire periodicities. In the new “unit cell” we find thousands of atoms of the original crystal. These atoms behave in ways that are incredibly counterintuitive. We show how the controlled twisting of graphene and MoTe2 layers has led to a slew of states of matter not possible in bulk conventional materials. We will show how the collective behavior of thousands of p orbitals in a moire unit cell of graphene can create single Heavy fermion at moire scale, and how the interaction between such fermions can lead to a perfect quantum simulator of an Anderson model. We will then present a catalogue of possible twistable materials and show how a huge variety of strongly interacting models can be realized in twisted homo and hetero twisted bilayers and multilayers of these materials.

Intervenant: Antoine Bourget

In the last decade, the concept of symmetry in quantum field theory has been vastly generalized, to so-called higher-form symmetries, and, more broadly, categorical symmetries, which can sometimes be non-invertible. If these statements sound weird to you, this lecture series is aimed at you.

I will introduce these generalized symmetries using the viewpoint of gauge (Maxwell and Yang-Mills) theories and anomalies, which both motivate the introduction of the new concepts and illustrate them.

Topics covered:

• Charge conservation and global symmetries in Maxwell theory
• Anomalies and higher-group symmetries
• Self-dual Yang-Mills theories and non-invertible symmetries
• Higher categories as the framework for describing symmetries

Livestream on youtube.com/IPhT-TV: no subscription required

Videoconference: subscribe to the course newsletter to receive links

Intervenant: Antoine Bourget

In the last decade, the concept of symmetry in quantum field theory has been vastly generalized, to so-called higher-form symmetries, and, more broadly, categorical symmetries, which can sometimes be non-invertible. If these statements sound weird to you, this lecture series is aimed at you.

I will introduce these generalized symmetries using the viewpoint of gauge (Maxwell and Yang-Mills) theories and anomalies, which both motivate the introduction of the new concepts and illustrate them.

Topics covered:

• Charge conservation and global symmetries in Maxwell theory
• Anomalies and higher-group symmetries
• Self-dual Yang-Mills theories and non-invertible symmetries
• Higher categories as the framework for describing symmetries

Livestream on youtube.com/IPhT-TV: no subscription required

Videoconference: subscribe to the course newsletter to receive links

Intervenant: Antoine Bourget

In the last decade, the concept of symmetry in quantum field theory has been vastly generalized, to so-called higher-form symmetries, and, more broadly, categorical symmetries, which can sometimes be non-invertible. If these statements sound weird to you, this lecture series is aimed at you.

I will introduce these generalized symmetries using the viewpoint of gauge (Maxwell and Yang-Mills) theories and anomalies, which both motivate the introduction of the new concepts and illustrate them.

Topics covered:

• Charge conservation and global symmetries in Maxwell theory
• Anomalies and higher-group symmetries
• Self-dual Yang-Mills theories and non-invertible symmetries
• Higher categories as the framework for describing symmetries

Livestream on youtube.com/IPhT-TV: no subscription required

Videoconference: subscribe to the course newsletter to receive links

TBA.

TBA.

TBA.

Intervenante: Laura Foini

Résumé disponible ultérieurement.