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Calendar of Physics Talks Vienna
| Electroweak Effects in Boosted Top Jet Production |
| Speaker: | Daniel Lechner (Univ. Wien) |
| Abstract: | High-precision determinations of the top quark mass parameter are crucial for consistency tests of the Standard Model(SM)as well as for searches for Beyond-the-SM physics.At future linear colliders, measurements of distributions of the kinematics of top decay products offer excellent prospects in this respect.The plethora of scales related to physics involving top quark jets makes the field-theoretic treatment of these kinematic distributions a complex task.However,by using a factorized approach including a string of Effective Field Theories, recently the accuracy of QCD calculations has reached the Next-to-Next-to-Next-to-Leading logarithmic level in the kinematic regime of highest interest.This amazing precision now also calls for a systematic inclusion of electroweak effects beyond a simple width for resonant top propagators that has been employed so far.This talk discusses how to ... |
| Date: | Tue, 02.11.2021 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, M. Procura |
| p-forms in AdS: renormalized charges and their non-conservation |
| Speaker: | Erfan Esmaeili (IPM) |
| Abstract: | The relation between infinite-dimensional asymptotic symmetry algebras and soft theorems in asymptotically flat spacetimes motivates investigating generalized boundary conditions in asymptotically AdS spacetimes as well. Recently, `leaky' boundary conditions for gravity have been defined so that after a consistent flat space limit, the well-known BMS symmetries are obtained. I will talk about a similar problem in the context of p-form theories. I will discuss the asymptotics and normalizability of solutions, and how adding counter-terms will renormalize the symplectic form of the theory and lead to infinitely-many finite surface charges on the AdS boundary. Electric/magnetic duality and conservation of the charges will also be discussed. |
| Date: | Thu, 04.11.2021 |
| Time: | 16:30 |
| Duration: | 60 min |
| Location: | Seminar room 10th floor (yellow tower) |
| Contact: | Laura Donnay |
| Non-hermitian topology and directional amplification |
| Speaker: | Andreas Nunnenkamp (University of Vienna) |
| Abstract: | Directional amplification, in which signals are selectively amplified depending on their propagation direction, has attracted much attention as one key resource for applications, including quantum information processing. Recently, several, physically very different, directional amplifiers have been proposed and realized in the lab. In this talk, I will present a unifying framework based on topology to understand non-reciprocity and directional amplification in driven-dissipative cavity arrays. Specifically, we unveil a one-to-one correspondence between a non-zero topological invariant defined on the spectrum of the dynamic matrix and regimes of directional amplification, in which the end-to-end gain grows exponentially with the number of cavities. I will also show the aforementioned correspondence between NH topology and directional amplification still holds in the presence of disorder. |
| Date: | Fri, 05.11.2021 |
| Time: | 10:00 |
| Duration: | 45 min |
| Location: | Atominstitut, Hörsaal and hybrid form |
| Contact: | Peter Rabl |
| ESI Medal Award Ceremony 2021 |
| Speaker: | Robert Seiringer, Jan Philip Solovej, Jakob Yngvason, Elliott Lieb (IST Austria, U of Copenhagen, U of Vienna, Princeton U) |
| Abstract: | The award ceremony will take place on November 5, 2021, at the Erwin Schrödinger Institute in Vienna. Elliott Lieb will participate online in the event.
Should you like to attend the ceremony in person, please sign up for it by sending an e-mail to secr@esi.ac.at. We will be happy to receive your registration by October 29, 2021 at the latest.
There will also be the opportunity to follow the ceremony online. The link to the ceremony will be available at https://www.esi.ac.at/events/e435/ |
| Date: | Fri, 05.11.2021 |
| Time: | 14:00 |
| Duration: | 240 min |
| Location: | Erwin Schrödinger Institute, Boltzmann Lecture Hall, Boltzmanngasse 9/2, 1090 Wien + Zoom |
| Contact: | secr@esi.ac.at |
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