Second lecture by Roderich Moessner (MPI Physik Komplexer Systeme Dresden, Germany).
Title: “Topological Phases of Matter in and out of Equilibrium”
Second lecture by Gerd Röpke (University of Rostock, Germany).
Title: “Correlations, Cluster Formation and Phase Transitions in Dense Fermion Systems”
Abstract: "Standard university or high-school physics teaching materials usually do not focus on bounce incydent. Description of arbitrarily spinning bouncing balls, however, is an important element of sports ball motion. We can describe the bounce using a set of equations that comes from the linear and angular impulse-momentum theorems. Finally, the numerical simulation results of different...
Abstract: "The aim of the research was to propose a model of social interactions that could explain the characteristic dynamics of election polling. In democratic societies, strong polarization of public opinion is often observed along with tight outcomes of elections. The presented model is based on the classical Ising model, where evolving in time, asymmetric weights of interactions in the...
Abstract: "In this study the energy levels of a 87Rb atom in a 2D spin dependent optical lattice are examined. Four counter-propagating laser beams produce a periodic scalar potential. As shown by Le Kien et al. [1], polarizing the beams by 45° results in an additional, spin dependent vector potential, that can be expressed through a fictitious magnetic field B_fic. The spectrum of energy...
Abstract: "The evolution of the main-sequence stars is governed by the reaction rates of the nuclear processes that occur in their interiors. The talk will cover the topic of a low-energy stellar nucleosynthesis reactions in the systems composed of the non-degenetate matter, in which the Maxwell-Boltzman distribution is valid. The reaction rates of the resonant and non-resonant reaction tuons...
Second lecture by Fiorella Burgio (University of Catania, Italy).
Title: “Phase Transitions in Neutron Stars”
First lecture by Constanca Providencia (University of Coimbra, Portugal).
Title: “The Complexity of Neutron Star Matter: from the Liquid-Gas Phase Transition to
Chiral Symmetry Breaking and Restoration”
Abstract: "Throughout history of physics, symmetry was arguably the most important idea in the description of nature. Especially fruitful was 20th century, when by combining it with Quantum Field Theory physicists managed to create the most accurate scientific theory in history, the Standard Model of particle physics. Beyond that, symmetry has been used as a guide to create better...
Abstract: "We discuss the concept of spontaneous symmetry breaking and illustrate it with a general example. We consider Wigner-Weyl and Nambu-Goldstone realisations of symmetry in the quantum theory. Next, we state Goldstone’s theorem and sketch its proof. We discuss why quantum chromodynamics is not realised in the Wigner-Weyl mode. We also consider different order parameters of spontaneous...
Abstract: "Exploration of global symmetry breaking process and its effects on the system. Attempting to understand the general meaning of symmetry in physical system and following specific example of symmetry breaking by exploring chiral effective models of QCD."
Abstract: "In the present paper we consider an optical waveguide array with embedded active nonlinear elements. We derive the theoretical background that describes wave propagation in the individual elements of the examined array, by combining nonlinearity with coupled mode equations, leading, under suitable assumptions, to the discrete non-linear Schrödinger equation, (DNLS). Adjusting DNLS...
Abstract: "The XXZ model, being a generalisation of the Heisenberg model, is one of the most basic descriptions of magnetism. The description of its low lying excitations in 1D is especially difficult because the conventional approximation of linear spin waves breaks down. Despite that, a magnon description can still provide a meaningful insight into the excitation spectrum. I will show the...
Abstract: "In this presentation, we delve into the intriguing world of diamagnetism, exploring its theoretical foundations and practical implementations in materials science and physics. Commencing with an elucidation of the fundamental principles governing diamagnetic phenomena, we unravel the intricacies of its response to external magnetic fields and its unique properties. Transitioning...
First lecture by Takami Kuroda (Albert-Einstein Institute Potsdam, Germany).
Title: “Quark Deconfinement in Supernova Explosions: How to probe it?”
Abstract: "As we know today, massive astrophysical bodies act as sources of gravitational waves, traveling deformations of the gravitational field. Although Albert Einstein predicted their existence in 1916, a better theoretical understanding of gravitational waves didn't emerge until 50 years later, spurred by Trautman's analysis of the radiation energy. Direct observation of these waves has...
Abstract: "The coupling of mechanical gears is usually done through their teeth, but a similar mechanism can be made using sets of magnets, so that the gears do not touch each other. I have investigated the phenomenon, visualized the magnetic field through simulation and brought to light the working principle of the mechanism."
Abstract: "We discuss the concept of spontaneous symmetry breaking and illustrate it with a general example. We consider Wigner-Weyl and Nambu-Goldstone realisations of symmetry in the quantum theory. Next, we state Goldstone’s theorem and sketch its proof. We discuss why quantum chromodynamics is not realised in the Wigner-Weyl mode. We also consider different order parameters of spontaneous...
Abstract: "The poster will discuss various properties of X(6900) and demonstrate and explanation of its unusual properties obtained by reducing one four-body problems into three two-body problems. Th solutions were obtained with Mathematica 12, first for charmonium spectrum, then for all-charm tetraquark spectrum which is understood as a pair of two-particle states, mesons or diquark-...
Abstract: "In the paper ”Additional Galactic Cepheids from the OGLE Survey” from 2020 the authors showed four classical cepheids OGLE-BLG-CEP-034, OGLEBLG-CEP-068, OGLE-BLG-CEP-098 and OGLE-GD-CEP-1244 in the regions outlined by the tidal radii of globular clusters NGC 6355, Pal 6, NGC 6569 and GLIMPSE01. The research aims to check if those cepheids are located inside those globular clusters...
Abstract: "In the twentieth century, two theories were intensively developed: the theory of relativity and quantum mechanics. They effectively model phenomena on their respective scales, but it is known that they are not compatible with each other. In the search for a single coherent theory, it is often postulated to introduce new elements into known models and to test hypotheses created in...
Second lecture by Constanca Providencia (University of Coimbra, Portugal).
Title: “The Complexity of Neutron Star Matter: from the Liquid-Gas Phase Transition to
Chiral Symmetry Breaking and Restoration”
Abstract: "Black holes cannot be observed directly, in the sense that they represent a causally separated region of spacetime. However, there are many different sources of electromagnetic radiation in its surroundings and visual background, whose photons allow us to trace the black hole's effects on spacetime. Null geodesics are strongly curved in the presence of a black hole's (or other ultra...
Abstract: "In this study the energy levels of a 87Rb atom in a 2D spin dependent optical lattice are examined. Four counter-propagating laser beams produce a periodic scalar potential. As shown by Le Kien et al. [1], polarizing the beams by 45° results in an additional, spin dependent vector potential, that can be expressed through a fictitious magnetic field B_fic. The spectrum of energy...
Abstract: "The phenomenon of pair production in a laser field holds significant implications for understanding fundamental aspects of quantum mechanics in intense electromagnetic environments. In this study, we delve into the dynamics of pair production within the framework of quantum kinetic equations, focusing particularly on the interplay between quantum coherence effects and the presence...
Third lecture by Gerd Röpke (University of Rostock, Germany).
Title: “Correlations, Cluster Formation and Phase Transitions in Dense Fermion Systems”
Third lecture by Prof. Gerd Röpke (University of Rostock, Germany)
Title: “Correlations, Cluster Formation and Phase Transitions in Dense Fermion Systems”
Abstract: "In the paper ”Additional Galactic Cepheids from the OGLE Survey” from 2020 the authors showed four classical cepheids OGLE-BLG-CEP-034, OGLEBLG-CEP-068, OGLE-BLG-CEP-098 and OGLE-GD-CEP-1244 in the regions outlined by the tidal radii of globular clusters NGC 6355, Pal 6, NGC 6569 and GLIMPSE01. The research aims to check if those cepheids are located inside those globular clusters...
Abstract: "The topic of exotic hadrons and their possible structures has been discussed deeply since the discovery of $\chi_{c_1}(3872)$. We will present possible structures for tetraquarks, and discuss how to use Green's functions to depict them. We will put a particular focus on the quark exchange diagrams in context of all-charm tetraquarks and explaining their properties."
Abstract: "The flux of cosmic neutrinos drops rapidly towards the highest energies. Therefore, huge volumes of dense, signal transparent, material have to be probed to allow for their detection. The Askaryan Radio Array collaboration aims to probe this flux through the radio signal from the in-ice particle cascade induced upon the interaction of a cosmic neutrino. Recently, it was shown cosmic...
Abstract: "FLRW metric give three cosmological horizons. They tell about relations between possibility of communication and change of Universe size. It may be also shown that the Hubble horizon give a part of Universe where talking about energy conservation has a sense."
Abstract: "We investigate the intricate relationships between the non-radial f mode oscillation frequencies of neutron stars (NS)s and the corresponding nuclear matter equation of state (EOS) using a machine learning (ML) approach within the ambit of the relativistic mean field (RMF) framework for nuclear matter. With two distinct parameterizations of the Walecka model, namely, (1) with...
Second lecture by Takami Kuroda (Albert-Einstein Institute Potsdam, Germany).
Title: “Quark Deconfinement in Supernova Explosions: How to probe it?”
