Events at Physics |
Events on Thursday, May 9th, 2024
- Academic Calendar
- Final Exams
- Abstract: *Note: actual end time may vary.* URL:
- R. G. Herb Condensed Matter Seminar
- Proper correlation measures: the case with Rényi mutual information
- Time: 10:00 am - 6:00 pm
- Place: 5310 Chamberlin
- Speaker: Laimei Nie, Purdue
- Abstract: Mutual information, defined via the linear combinations of von Neumann entanglement entropies, measures the total correlations between two subsystems and has played a vital role in characterizing equilibrium and non-equilibrium phenomena in many-body physics. In practice, its Renyi counterpart is usually computed owing to its simplicity. However, this commonly used notion of Renyi Mutual Information (RMI) cannot be interpreted as a measure of correlation, because it is neither non-negative nor does it satisfy the Data Processing Inequality. In this talk, we will explore several classes of properly defined RMIs. In particular, we develop an easily implementable replica trick which enables us to evaluate these RMIs in a variety of many-body systems, including 2D conformal field theories and random tensor networks. We will also discuss the prospect of measuring these new RMIs in quantum simulator experiments.
- Host: Ilya Esterlis
- NPAC (Nuclear/Particle/Astro/Cosmo) Forum
- High-energy and ultrahigh-energy neutrinos: a new window for astrophysics and particle physics
- Time: 2:30 pm - 3:30 pm
- Place: CH 5280
- Speaker: Bei Zhou, Fermilab
- Abstract: High-energy (HE; ~100 GeV to 100 PeV) and ultrahigh-energy (UHE; >~ 100 PeV) neutrinos are crucial for neutrino astrophysics, high-energy astrophysics, and multimessenger astronomy. They also offer significant opportunities to study neutrino interactions, test the Standard Model of particle physics, and explore physics beyond the Standard Model. In this talk, I will first talk about final state radiation, which impacts both HE and UHE neutrino observations (https://arxiv.org/abs/2403.07984), a QED radiative correction as large as 25% while completely overlooked by current experiments. Then, on the astrophysics side, I will talk about the search for HE neutrinos choked-jet supernova using IceCube public data (https://arxiv.org/abs/2210.03088). Finally, I will talk about an improved calculation of the W-boson production which is relevant for HE neutrino observations (https://arxiv.org/abs/2305.10497).
- Host: Francis Halzen