Zdravo svima,
u narednih par nedelja ce u poseti nasoj grupi boraviti kolege iz Bratislave i Vroclava. Posete se realizuju u okviru CEEPUS mreze "Quantum spacetime, gravity and cosmology" pa ce gosti odrzati predavanja/seminare na temu svojih istrazivanja, ali malo vise prolagodjena studentima i mladjim istrazivacima. Predavanja ce biti cetvrtkom na Fizickom fakultetu, pocev od ove nedelje. Zamolila bih sve nase doktorane i master studente, da dodju. Naravno i svi ostali, kako ko moze.
Nadam se da se vidimo, pozdrav svima!
Marija
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Raspored predavanja
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ČETVRTAK 15. maj, 14 časova, učionica 750 na Fizičkom fakultetu
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Prof. Marija Dimitrijević Ćirić (Fizički fakultet, Beograd)
Title: O CEEPUS programu i QSGravCos mrezi
Abstract: Ukratko ćemo se upoznati sa idejom CEEPUS (Central European Exchange Program for University Studies) programa i mrežom "Quantum spacetime, gravity and cosmology" i diskutovati mogućnosti za studentske i nastavničke posete akademskim institucijama u okviru ove mreze.
Dr Samuel Kováčik (Comenius University, Bratislava)
Title: The Fuzzy Onion
Abstract: Recently, a matrix formulation of a three-dimensional quantum space was proposed. The basic idea is that an (in)finite number of fuzzy spheres can be glued together in a specific way. During the seminar, we will discuss the construction of the model with some recent examples from field theory, quantum mechanics and classical physics.
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ČETVRTAK 29. maj, 14 časova, učionica 750 na Fizičkom fakultetu
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prof. Dragoljub Dimitrijević (PMF Nis)
Title: Scalar Fields in Cosmology
Abstract: Cosmological observational data has been collected over the last thirty years. These include the precise measurement of CMB radiation, evidence of the accelerated expansion of the Universe, the discovery of gravitational waves, an image of the black hole at the center of the supergiant elliptical galaxy and many others. In order to study for example Cosmological Inflation or primordial black holes we need to use real scalar fields in curved space-time background. The scalar fields in use are canonical and non-canonical scalar fields. This is introductory story of one interesting
non-canonical scalar field - tachyon scalar field.
Prof. Andrzej Borowiec (Wroclaw University, Wroclaw)
Title: Scalar-tensor gravity models and their application in cosmology
Abstract: Scalar-tensor gravity is the most straightforward generalization of Einstein metric gravity by adding a single scalar field. It can be helpful in solving various problems plaguing the original theory, such as non-renormalizability or the well-known dark energy and dark matter problems in cosmology. During my lecture, I will focus on the internal mathematical structure of such a class of theories, the role of conformal transformation, choice of frame, non-minimal coupling to the matter stress-energy tensor, and the role played by invariant quantities. I will point out the difference between purely metric, Palatini, or hybrid approaches and how they can be described in a unified way. Next, I provide concrete cosmological models and their analyses in the minisuperspace formalism, which allows one to take into account the arbitrary form of the stress-energy tensor non-minimally coupled to the metric. In particular, the possibility of separating dark from baryonic matter following cosmological data will be presented.
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ČETVRTAK 5. jun, 14 časova, učionica 750 na Fizičkom fakultetu
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Doc. Dr Dragan Prekrat (Farmaceutski fakultet, Beogradu)
Title: Matrix models on truncated Heisenberg algebra
Abstract: In this seminar, we will explore the properties of matrix models defined on the noncommutative space of the truncated Heisenberg algebra. We begin with the Grosse–Wulkenhaar model, well known for its renormalizability, and examine the relationship between this feature and its phase structure. We will then present some preliminary numerical results on a related non-renormalizable gauge model and propose a possible approach to address its challenges.
Dr Juraj Tekel (Comenius University, Bratislava)
Title: Fuzzy onion strikes back
Abstract: You will have heard a talk by my colleague Samuel about a structure of layered fuzzy spheres called fuzzy onion. I will continue along this path and explain more about topics he did not have time to mention, especially related to paths of promising research. Ranging from technical aspects such as fuzzyfication of radial coordinate using spectral triples to conceptual issues such as emergence of the onion as solution of M-theory models.
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