У оквиру семинара Групе за гравитацију, честице и поља Института за физику у Београду, у петак, 13. јануара 2023. године у 11 часова на Физичком факултету у Београду у сали 665, др Марко Војиновић (Институт за физику у Београду), одржаће трећи део предавања:

Introduction to category theory and n-groups 

САЖЕТАК:

In the third lecture, we will discuss three important examples of categories and functors between them. These examples illustrate an important relationship between category theory, Lie groups, and differential geometry — primarily in the context of the path groupoid category, which will be defined and discussed in detail. The material of this lecture is important as a preparation for the remainder of the course, which will focus on higher categories and generalizations of structures in differential geometry using higher category theory.

The lectures are based on material from papers arXiv:q-alg/9705009 and arXiv:1003.4485.

У оквиру семинара Групе за гравитацију, честице и поља Института за физику у Београду, у петак, 23. децембра 2022. године у 11 часова на Физичком факултету у Београду у сали 665, др Марко Војиновић (Институт за физику у Београду), одржаће предавање:

Introduction to category theory and n-groups (part 2)

САЖЕТАК:

This is the second of a sequence of lectures about higher category theory and n-groups. We will introduce the notions of a category, a group, and a functor, after which we shall give a couple of examples convenient for physics. If time permits, we will also introduce the notions of a strict and weak 2 category, a 2-group, and a crossed module, also with appropriate examples.

The lecture is based on material from papers arXiv:q-alg/9705009, arXiv:1003.4485.

У оквиру семинара Центра за фотонику Института за физику у Београду, у четвртак, 15. децембра 2022. године у 11 часова у читаоници библиотеке „др Драган Поповић“, др Ив Каудано (професор квантне механике на Универзитету у Намуру, одржаће предавање:

Weak measurements, geometric phases, and quantum paradoxes: from quantum foundations to quantum optical experiments

У оквиру семинара Групе за гравитацију, честице и поља Института за физику у Београду, у петак, 16. децембра 2022. године у 11 часова путем BigBlueButton платформе, др Марко Војиновић (Институт за физику у Београду), одржаће предавање:

Introduction to category theory and n-groups

САЖЕТАК:

This is the first of a sequence of lectures about higher category theory and n-groups. We will discuss the motivation for introducing n-groups, and demonstrate some of their basic properties. After introducing the idea of higher groups and discussing why they should be relevant for physics, we will demonstrate the equivalence between a strict 2-group and a crossed module, which is a technically more convenient tool. We will also discuss everything on the example of the Poincaré 2-group, which should help us to build some intuition.

The lecture is motivated mainly by papers arXiv:q-alg/9705009, arXiv:1003.4485.

Приступите предавању

У оквиру семинара Центра за чврсто стање и нове материјале Института за физику у Београду, у четвртак, 15. децембра 2022. године, у 13 часова у читаоници библиотеке „др Драган Поповић“, др Антон Градишек (Департман за физику чврстог стања, Институт „Јожеф Стефан“, Љубљана) одржаће предавање:

Studies of molecular dynamics in hydrogen storage materials and solid-state electrolytes by nuclear magnetic resonance

САЖЕТАК:

In view of global energy supply crisis and climate emergency, hydrogen is yet again becoming an attractive energy carrier. It can be produced using renewables and leaves only water when using it in a fuel cell. However, before a wider adoption of hydrogen technologies, there are still several technical challenges that need to be addressed. In the first part of the seminar, I will present an overview of some topics related to hydrogen economy. In the second part, I will focus on some of our studies of molecular dynamics by means of nuclear magnetic resonance (NMR). Initially, we started investigating metal hydrides as possible hydrogen storage materials. Our research then shifted to solid-state electrolytes that could be used in fuel cells. I will demonstrate how NMR can be used to study dynamic processes either on a long or on a short scale.