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Calendar of Physics Talks Vienna
| Charming discoveries in antimatter-matter annihilations |
| Speaker: | Dr. Johan Messchendorp (KVI-CART/University of Groningen) |
| Abstract: | Despite the successes of the Standard Model of particle physics, it remains a challenge to understand the dynamics of the strong interaction among the building blocks of hadronic matter, namely quarks and gluons. At small distance scales or at high energies, the underlying theory, the Quantum Chromodynamics (QCD), is well tested and understood. Our understanding of the strong interaction deteriorates dramatically at larger distances scales such as the size of the nucleon. This so-called "strong QCD regime” exhibits spectacular effects such as the generation of hadron masses and color confinement. Moreover, the nature of QCD implies the existence of gluon-rich hadrons, such as glueballs and hybrids, multi-quark states, and molecules. The annihilation of matter with antimatter ... (for complete abstract visit: https://indico.smi.oeaw.ac.at/event/336/) |
| Date: | Wed, 10.07.2019 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | Stefan-Meyer-Institut, Boltzmanngasse 3, 1090 Wien, Seminarraum 3-2-08 (2. Stock) |
| Contact: | Prof. Dr. Eberhard Widmann, Dr. Martin Simon |
| The non-equilibrium attractor: Beyond hydrodynamics |
| Speaker: | Michael Strickland (Kent State University, USA) |
| Abstract: | The quark-gluon plasma created in heavy-ion collisions is not in local thermal equilibrium at early times. Despite this, dissipative hydrodynamics describes the evolution of the energy-momentum tensor quite well after only 0.5 - 1 fm/c. This can be understood using the concept of a non-equilibrium dynamical attractor. The attractor is a uniquely identifiable solution to the dynamical equations to which all solutions are drawn as the system evolves. Once solutions collapse onto the non-equilibrium attractor they are "pseudo-thermalized" in the sense that they have lost information about the precise initial conditions used, but are not yet in exact local thermal equilibrium. In this talk I will review recent work which demonstrates that there exists a non-equilibrium attractor in full kinetic theory models which goes beyond the usual low-order momentum moments in hydrodynamical treatments. |
| Date: | Thu, 11.07.2019 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Institute for Theoretical Physics, TU Wien, Seminar room 10th floor (yellow area), Wiedner Haupstr. 8-10, 1040 |
| Contact: | K. Boguslavski, A. Rebhan |
| The adventures of queer and rebellious NAdS2 |
| Speaker: | Ayan Mukhopadhyay (Indian Institute of Technology Madras, Chennai, India) |
| Abstract: | NAdS2 holography is a playground for understanding many fundamental questions. It provides insights on low dimensional strongly interacting systems, black holes, and the interplay between quantum information and dynamics. We show how to obtain time-dependent solutions in NAdS2 holography given by Jackiw-Teitelboim (JT) gravity minimally coupled to non-conformal matter. With ordinary Dirichlet boundary conditions, the behavior is similar to higher dimensional cases. However, if the source at the boundary is dynamical and it couples to NAdS2 such that there is a total conserved energy, then we find that in the long run the mass of the black hole disappears and the total energy is transferred to the kinetic energy of the source if it is large. The solution is also free of naked singularities. We will discuss some consequences and motivate a new effective theory of the horizon. |
| Date: | Fri, 12.07.2019 |
| Time: | 10:30 |
| Duration: | 60 min |
| Location: | Institute for Theoretical Physics, TU Wien, Seminar room 10th floor (yellow area), Wiedner Haupstr. 8-10, 1040 |
| Contact: | A. Rebhan, A. Ipp, K. Boguslavski |
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