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Calendar of Physics Talks Vienna
| Advances in magnetic racetrack memory and logic technology |
| Speaker: | Andrea Migliorini (Max Planck Institute for Microstructure Physics, Halle (Saale)/Germany) |
| Abstract: | Recent developments in spintronic devices based on current-induced domain wall motion, including the realization of domain-wall logic operators [1], and the demonstration of unconventional computing characteristics at the nanoscale [2], have provided a significant contribution toward the implementation of magnetic racetrack applications [3-4], which hold great promise for the realization of 3D memory and logic architectures [5-6].
In this seminar, I will discuss our recent progress toward the implementation of domain-wall-based racetrack nanodevices, in terms of materials development, device engineering for advanced functionalities, and realization of working memory devices. First, we have recently introduced a new class of L10 binary alloys based on Al and 5d transition metals, which generate large spin-orbit torques and promote very efficient motion of domain walls driven by short cur |
| Date: | Mon, 28.10.2024 |
| Time: | 10:00 |
| Duration: | 60 min |
| Location: | TU Wien, Institut für Angewandte Physik, E134 1040 Wien, Wiedner HauptstraÃe 8-10 Yellow Tower âBâ, 5th floor, SEM.R. DB gelb 05 A |
| Contact: | Prod. Amalio Fernandez-Pacheco |
| Hawking Radiation After Scrambling Time |
| Speaker: | Pei-Ming Ho (National Taiwan University) |
| Abstract: | We investigate the effects of the generalized uncertainty principle (GUP) on Hawking radiation in a quantum field theory. Our calculations demonstrate that the GUP leads to a suppression of Hawking radiation near the scrambling time. This finding challenges the conventional understanding of Hawking radiation's robustness and is consistent with the nice-slice argument. We discuss the implications of these results for the black hole information paradox and the nature of quantum gravity. |
| Date: | Tue, 29.10.2024 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger-Hoersaal, 1090 Vienna, Boltzmanngasse 5, 5th floor |
| Contact: | S. Fredenhagen, H. Steinacker, M. Sperling |
| Factorization restoration through Glauber gluons, Part 2 |
| Speaker: | Matthias Neubert (University of Mainz) |
| Abstract: | I will discuss new insights into the low-energy dynamics of gap-between-jets cross sections at hadron colliders, for which phase factors in the hard amplitudes spoil collinear cancellations and lead to double (âsuper- leadingâ) logarithmic behavior. Based on a method-of-regions analysis, we have identified three-loop contributions from perturbative active-active Glauber-gluon exchanges with the right structure to render the cross section consistent with PDF factorization below the gap veto scale. These Glauber contributions are unambiguously defined without regulators beyond dimensional regularization. |
| Date: | Tue, 29.10.2024 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger-HS, Boltzmanngasse 5, 1090 Wien, 5.Stock |
| Contact: | A. Hoang, M. Procura |
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