Events
Condensed Matter Seminar
Criticality in quantum ferroelectric metals
Dr. Avraham Klein
Ariel University
Mon, 11 Nov 2024, 11:10
Sacta-Rashi Building for Physics (54), room 207
Abstract: Quantum ferroelectric metals offer a fascinating window into the dynamical processes that give rise to inversion symmetry breaking in quantum materials. At the same time, they constitute an extremely promising platform for future quantum applications. I will describe a recent theoretical attempt to describe the ferroelectric quantum critical point in such systems, and share some insights about what makes the ferroelectric transition unique in the landscape of symmetry-breaking phenomena in correlated electron systems. Finally, I will discuss our current understanding of superconducting strontium titanate and its relation to ferroelectric quantum criticality.
Particles and Fields Seminar
Deep learning for reconstructing and simulating particles in collider experiments
Etienne Dreyer
Weizmann Institute
Mon, 11 Nov 2024, 14:00
Sacta-Rashi Building for Physics (54), room 207
Abstract: Particle detectors like ATLAS and CMS are highly sophisticated systems designed to record the aftermath of high-energy particle collisions. To interpret the vast and complex data generated, physicists rely on pattern recognition algorithms to reconstruct the particles produced in these collisions. In this talk, I will present new results from an algorithm that leverages deep learning with hypergraphs to enhance particle reconstruction quality. Additionally, I will explore the potential of deep learning as a groundbreaking tool for modeling particle interactions in detectors. These “virtual detector” models can rapidly generate data that mimic the full particle reconstruction chain, bypassing the computationally expensive step of simulating particle interactions at the microscopic level. Both developments underscore how deep learning is shaping the future of reconstruction and simulation pipelines in collider experiments.
Physics Colloquium
What do we know about the Circumgalactic Medium?
Dr. Yakov Faerman
University of Washington
Tue, 12 Nov 2024, 12:00
Ilse Katz Institute for Nanoscale Science & Technology (51), room 015
Abstract: At the meeting point of galaxies with the large scale structure of the Universe lies the circumgalactic medium (CGM), the galactic diffuse atmosphere. Recent observations reveal that the CGM is ubiquitous, detected around star forming and quiescent galaxies, and that it is an extended and multiphase structure. However, due to the challenging nature of the measurements, many questions remain open - how much gas is out there, what are its thermal properties, spatial distribution, and morphology? These are linked to the properties of gas accretion onto galaxies, star formation, and galactic feedback processes, and are crucial to our understanding of galaxy evolution and how they affect the distribution of matter on large scales.
In this talk I will describe the models I developed to address these questions and discuss recent progress in the field. First, I will show what we learned from applying our models to observations of Milky-Way-mass galaxies, constraining the CGM mass, gas morphology, and energetics. I will present ongoing work on low-mass galaxies, and plans to extend my modeling framework. Finally, I will show predictions for upcoming observations and future facilities (including CMB-S4, ELT, HWO, and more), which will allow us to test and improve our understanding of the physical processes governing the CGM.
Biological and soft-matter physics
TBA
Dr. Yoav Lahini
School of Physics and Astronomy, Tel-Aviv University
Thu, 14 Nov 2024, 12:00
Sacta-Rashi Building for Physics (54), room 207
Abstract: TBA
Particles and Fields Seminar
TBA
Joshua Feinberg
Haifa University
Mon, 18 Nov 2024, 14:00
Sacta-Rashi Building for Physics (54), room 207
Abstract:
Physics Colloquium
TBA
Prof. Peter Barker
University College London
Tue, 19 Nov 2024, 12:00
Zoom only
Abstract:
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