Colloqui di Dipartimento / Physics Colloquia

Europe/Rome
412C (Room)

412C

Room

Stefania Vecchi (Istituto Nazionale di Fisica Nucleare)
Description

link ai video dei seminari: https://www.youtube.com/c/FisicaScienzeDellaTerraFerrara/videos

    • 16:00 17:00
      ChatGPT and HDL: is it that simple? 1h

      This talk explores the integration of AI into FPGA design, focusing on my experience using ChatGPT to develop a VHDL component. During the presentation a brief introduction to Field-Programmable Gate Arrays (FPGAs) will be given, highlighting their importance in modern digital design. Following this, a historical overview of VHDL (VHSIC Hardware Description Language) will be provided, outlining its evolution and significance in hardware development. The core of the talk will describe the task I aimed to accomplish, detailing the process of leveraging ChatGPT for VHDL coding assistance. I will share the challenges encountered, the solutions proposed by the AI, and the steps required to refine the generated code to ensure it functioned as intended. The session will conclude with reflections on the potential and limitations of using AI tools like ChatGPT in FPGA and VHDL design workflows.

      Speaker: Nicolò Vladi Biesuz (INFN, Ferrara (IT))
    • 16:00 17:00
      A supermassive black hole lurking in the center of our Galaxy − really? 1h

      There is surmounting observational evidence of the existence of a dark matter component in the Universe. However, there is neither theoretical consensus nor experimental proof of its exact nature. To constrain it, we must describe astrophysical data with as precise as possible theoretical models in which setting the dark matter particle candidate is only the first step. In this talk, it is discussed how the dynamics of stars in the Galactic outer halo and from the closest stars to the supermassive compact object of 4 million solar masses sitting at the Galactic center, Sgr A, constrains dark matter made of neutral fermions to have a rest mass of about 50-300 keV, an extremely tight range compared with the more than 40 orders of magnitude spanning the mass of dark matter candidates in the literature! The distribution of dark matter fermions in galaxies forms dense cores at their center. In the case of our Galaxy, a fermionic dark matter core can be an alternative to the supermassive black hole hypothesis for Sgr A, explaining the existing data from ground-based telescopes of the S-cluster stars and the Event Horizon Telescope radio data on the "black hole shadow". Far from being a disguise of black holes, the dark matter cores of tens of millions of solar masses can gravitationally collapse, providing a key channel for the formation of the supermassive black holes in the Universe, including those being observed by the James Webb Space Telescope in the farthest galaxies in the high-redshift Universe. Further future astrophysical probes for dark matter fermions are outlined.

      -- postponed to 5th March 2025

      Speaker: Jorge A. Rueda (International Center for Relativistic Astrophysics Network - Seats at Department of Physics & Earth Science, Ferrara University)
    • 16:00 17:00
      The great lab in the sky: cosmology meets particle physics 1h

      In recent decades, precision cosmological observations have emerged as a powerful tool for constraining particle physics models and addressing key unresolved issues in modern physics.
      In this talk, I will explore examples of this fruitful interplay between cosmology and particle physics.
      Observations of the cosmic microwave background anisotropies and the large-scale galaxy distribution place stringent limits on the mass and density of neutrinos. Additionally, more unconventional scenarios, such as non-standard neutrino interactions or the potential existence of axion-like particles, can be investigated through cosmological measurements.
      I will outline the current constraints and discuss future prospects.

      Speaker: Massimiliano Lattanzi (Istituto Nazionale di Fisica Nucleare)
    • 16:00 17:00
      New materials: biocompatible, light, flexible, above all…MAGNETIC 1h

      Magnetically responsive materials, obtained by combining a biopolymer with magnetic nanostructures, are considered strategic for making progress in technological fields such as soft robotics and smart medicine. In addition to biocompatibility, other crucial properties for these systems are lightness, mechanical robustness and softness. Protein-based biopolymers meet these requirements, especially spider silk, which exhibits exceptional strength and flexibility. However, the coupling of biopolymer and magnetic nanostructures can alter the mechanical properties of the former or the magnetic behavior of the latter, ultimately compromising the desired performance. This may depend on the chemical and structural characteristics of the two components, as well as their relative concentrations in the composite.
      In this lecture I will present a recent research activity concerning artificial spider silk fibers endowed with magnetic functionality through different strategies: i) by incorporating iron oxide magnetic nanoparticles; ii) by decorating their surface with an ultrathin magnetostrictive FeCo layer.
      I will focus on the magnetic properties of these innovative composite materials, and this will allow me to explain some key concepts of Nano-Magnetism.

      Speaker: LUCIA DEL BIANCO (Dipartimento di Fisica e Scienze della Terra, Università di Ferrara)
    • 16:00 17:00
      Small particles for a big science: The DUNE experiment 1h

      The Deep Underground Neutrino Experiment (DUNE) is a leading-edge, international experiment for neutrino science that will start data-taking in the early '30s.
      DUNE will consist of two neutrino detectors placed in the world's most intense neutrino beam, the long baseline neutrino facility (LBNF). A complex of detectors will record particle interactions near the source of the beam, at the Fermi National Accelerator Laboratory in Batavia, Illinois.
      These detectors (ND) will study neutrino beam features near the production site using the combination of three different apparatuses both on and off axis. A second, much larger, detector complex will be installed more than a kilometer underground at the Sanford Underground Research Laboratory in Lead, South Dakota - 1,300 kilometers downstream of the source.
      These detectors, known as "far detectors" (FD), are 17kton liquid Argon time-projection chambers and will enable a deep study of the neutrino oscillation, opening the possibility of groundbreaking discoveries in the field of particle physics.
      The primary science objectives of DUNE are in fact the test CP violation in the lepton sector, which explores why the universe is made of matter, the determination of the ordering of the neutrino masses, the studies of supernovae looking at neutrino signals, and the search for proton decay, which has never been observed.
      The importance of these goals has led to proposals for competing projects in other countries such as HK experiment in Japan, scheduled to begin data-taking in the same decade of DUNE.

      Speakers: Marco Guarise (University of Ferrara), Marco Guarise (Istituto Nazionale di Fisica Nucleare)