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Calendar of Physics Talks Vienna
| Factorization of non-global LHC observables Part 2: The Glauber series |
| Speaker: | Matthias Neubert (University of Mainz) |
| Abstract: | We present a systematic formalism based on a factorization theorem in Soft-Collinear Effective Theory (SCET) to describe non-global observables at hadron colliders, such as gap-between-jets cross sections. The cross sections are factorized into convolutions of hard functions, capturing the dependence on the partonic center-of-mass energy $\sqrt{\hat s}$, and low-energy matrix elements, which are sensitive to the low scale $Q_0\ll\sqrt{\hat s}$ characteristic of the veto imposed on energetic emissions into the gap region between the jets. The scale evolution of both objects is governed by a renormalization-group equation, whose form we derive. With the help of this equation, we develop an EFT-based approach to the resummation of so-called âÂÂnon-global logarithms'', including the âÂÂsuper-leading logarithmsâ discovered by Forshaw et al. in 2006, which only appear in hadron-collider processes. |
| Date: | Tue, 21.05.2024 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger-Hoersaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, M. Procura |
| Dynamics of conformal scalar field in asymptotically-AdS black hole spacetimes |
| Speaker: | Filip Ficek (University of Vienna) |
| Abstract: | Conformally invariant scalar equation allows one to impose the Robin boundary condition at infinity in asymptotically-AdS spacetimes. In our work, we show how the dynamics of conformal cubic scalar field on the Schwarzschild-anti-de Sitter background depend on the black hole size and the choice of the boundary condition. We also discuss the work in progress regarding the charged black hole case. This is joint work with Maciej Maliborski. |
| Date: | Wed, 22.05.2024 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | ESI Main Lecture Hall, Boltzmanngasse 9 |
| Contact: | Piotr T. Chrusciel |
| Loop-String-Hadron Dynamics in non-Abelian Lattice Gauge Theories |
| Speaker: | Indrakshi Raychowdhury (BITS-Pilani, India) |
| Abstract: | The advances in quantum technology are inducing interest in studying the real-time dynamics of lattice-gauge theories, aiming to study lattice-QCD via quantum simulation. However, the road to this goal is yet to be found via developing the underlying framework, developing quantum algorithms, and implementing the same on quantum hardware. The choice of the framework acts as an important design decision, specifically for non-Abeian gauge theories. In this talk, we present the loop-string-hadron framework developed towards this goal and discuss its novelty over other approaches. We highlight a few recent and ongoing works utilizing this framework in the context of developing analog simulators, universal quantum algorithms, tensor network calculations, and understanding the thermalization of the dynamics. |
| Date: | Thu, 23.05.2024 |
| Time: | 15:00 |
| Duration: | 60 min |
| Location: | TU Wien: Wiedner Hauptstr. 8-10, yellow area, 10th floor, seminar room DB10E11 |
| Contact: | Kirill Boguslavski |
| Phase transition of photons and gravitons in a Casimir box |
| Speaker: | Ankit Aggarwal (TU Wien) |
| Abstract: | We study a novel phase transition for photons and gravitons in a Casimir box analytically. It is closely related to Bose-Einstein condensation and accompanied by a quantum phase transition whose control parameter is the chemical potential for optical helicity. |
| Date: | Thu, 23.05.2024 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | TU Wien, Freihaus, Seminar room on the 4th floor (yellow area) |
| Contact: | Iva Lovrekovic |
| Dynamical quasi-condensation of interacting fermions, and the predictive power of the time-dependent two-particle reduced density matrix method |
| Speaker: | Iva Brezinova (TU Wien) |
| Abstract: | Superconductivity is one of the most intriguing collective electronic phenomena in solid state physics, traditionally viewed as an effect at (or near) equilibrium. However, several recent experiments have shown that superconductivity can be induced by external driving, stimulating new interest in dynamical condensation effects in fermionic systems. A theoretical description of these effects requires a sufficiently accurate solution of the time-dependent Schrödinger equation in the presence of correlations. Interestingly, methodological developments for the theoretical treatment of correlated non-equilibrium systems lag behind those achieved for equilibrium problems and remain a major challenge. In my talk, I will present our approach to tackle explicitly time-dependent many-body fermionic systems based on the two-particle reduced density matrix. By avoiding the wavefunction altogether, t |
| Date: | Fri, 24.05.2024 |
| Time: | 10:00 |
| Duration: | 45 min |
| Location: | Helmut Rauch HÃÂörsaal ATI |
| Contact: | Julian Leonard |
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