Date : January 30, 2024, 16:00 CET Karl Landsteiner (IFT-UAM/CSIC) Link: https://ua-edu.zoom.us/j/86037901654?pwd=bkVHY1pGYUdqcDF3SnhQb2lHSGVkQT09 Pseudospectra of Holographic Quasinormal Modes Abstract: Quasinormal modes and frequencies are the eigenvectors and eigenvalues of a non-Hermitian differential operator. They are of crucial importance in the physics of black holes. The analysis of quasinormal modes in asymptotically Anti-de Sitter geometries plays also a […]

Date : January 23, 2024, 18:15 CET Luca Delacretaz (University of Chicago) Link: https://ua-edu.zoom.us/j/86037901654?pwd=bkVHY1pGYUdqcDF3SnhQb2lHSGVkQT09 Bound on thermalization from hydrodynamic fluctuations Abstract: Interacting systems thermalize. They can do so arbitrarily slowly, but not arbitrarily fast: the time scale necessary for a quantum many-body system to reach local thermal equilibrium has been conjectured to be bounded below by […]

Date : January 16, 2024, 16:00 CET Alberto Nicolis (Columbia University) Link: https://ua-edu.zoom.us/j/86037901654?pwd=bkVHY1pGYUdqcDF3SnhQb2lHSGVkQT09 Apparent fine-tunings from broken spacetime symmetries Abstract: I will exhibit a class of effective field theories that have hierarchically small Wilson coefficients for operators that are not protected by symmetries but are not finely tuned. These theories possess bounded target spaces and vacua […]

Date : January 9, 2024, 16:00 CET Julio Virrueta (Jena University) Link: https://us06web.zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Holographic effective actions for charged fluids Abstract: I will discuss the real-time dynamics of gravitons and photon fluctuations around the AdS-Reissner-Nordstrom black hole and argue that the dynamics of these modes are captured by a set of designer scalars in the background geometry. […]

Date : November 28, 2023, 16:00 CET Andrew Lucas (University of Colorado Boulder) Link: https://ua-edu.zoom.us/j/86037901654?pwd=bkVHY1pGYUdqcDF3SnhQb2lHSGVkQT09 Disordered quantum critical fixed points from holography I will show that in holographic theories, adding disorder whose scaling dimension is just below the Harris criterion triggers a flow to a stable fixed point with finite disorder strength. The effect can be […]

Date : November 21, 2023, 16:00 CET Francisco Peña Benítez (Wroclaw University of Science and Technology) Link: https://ua-edu.zoom.us/j/86037901654?pwd=bkVHY1pGYUdqcDF3SnhQb2lHSGVkQT09 Fractons gauge theory vs Gravity Fractons, exotic quasiparticles found in specific condensed matter systems, showcase intriguing properties, notably limited mobility, challenging conventional notions of particle physics and capturing considerable attention in quantum matter exploration. One category of fracton […]

Date : November 14, 2023, 16:00 CET Dominic Else (Perimeter Institute) Link: https://ua-edu.zoom.us/j/86037901654?pwd=bkVHY1pGYUdqcDF3SnhQb2lHSGVkQT09 A holographic effective field theory for a metal with a Fermi surface Accessing the physics of strongly coupled metals in a controlled way is a challenging problem in theoretical condensed matter physics. In this talk, I will re-examine the possibility of understanding strongly […]

Date : November 27, 2023, 18:00 CET Participants:Akash Jain, Pavel Kovtun (Team Victoria)Lorenzo Gavassino, Mauricio Hippert, Nicki Mullins, Jorge Noronha (Team Chicago) Link: https://ua-edu.zoom.us/j/86037901654?pwd=bkVHY1pGYUdqcDF3SnhQb2lHSGVkQT09 A rigorous pathway to causal stable hydrodynamics? Abstract: On September 1st, 2023, two papers on causal stable hydrodynamics appeared simultaneously on the arXiv, [1] and [2]. Both papers discuss their results based […]

Date : December 5, 2023, 10:00 CET Markus Amano (Yamagata University) Link: https://ua-edu.zoom.us/j/86037901654?pwd=bkVHY1pGYUdqcDF3SnhQb2lHSGVkQT09 Relativistic Hydrodynamics under Rotation with Holography Abstract: In the realm of strongly-coupled systems, holography, has emerged as an invaluable tool for investigating hydrodynamical properties of strongly coupled fluids, like quark gluon plasmas. Based on recent work, this talk will present the findings about […]

Date : October 17, 2023, 16:00 CEST Xin An (North Carolina University) Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Relativistic fluctuation dynamics Abstract: Fluctuations are ubiquitous phenomena that emerge across various physical scales. In the context of heavy-ion collisions where the system can be treated hydrodynamically, fluctuations are important for describing the event-by-event collision processes, and become rather crucial for understanding the […]