Date : February 14, 2023, 14:00 CET Koji Hashimoto (Kyoto University) Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Machine learning the bulk in AdS/CFT Abstract: Bulk reconstruction in AdS/CFT correspondence is a key idea revealing themechanism of it, and various methods were proposed to solve the inverseproblem. We use deep learning and identify the neural network as theemergent geometry, to reconstruct […]

Date : February 7, 2023, 16:00 CET Paul Romatschke (University of Colorado, Boulder) Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Quantum Field Theory in Wonderland Abstract: Wouldn’t it be nice to solve large N QCD analytically? While QCD is hard, it is fairly easy to solve scalar field theories with many components, such as the O(N) model in the large N […]

Date : January 17, 2023, 16:00 CET Johanna Erdmenger (University of Würzburg) Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Discrete Holography Abstract: I will review recent progress towards establishing a holographic duality for discrete spaces involving a regular tiling of hyperbolic space. Discrete holography is of interest to a broad audience reaching – beyond holographers – from mathematicians interested in CFTs […]

Date : January 10, 2023, 16:00 CET Christoph Uhlemann (Oxford University) Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Double holography and Page curves in Type IIB Abstract: In recent progress on the black hole information paradox, Page curves consistent with unitarity have been obtained in 2d models and in bottom-up braneworld models using the notion of double holography. In this talk […]

Date : December 6, 2022, 16:00 CET Erik van Heumen (University of Amsterdam) Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Probing low energy quantum matter Abstract: In this talk I will discuss how optical experiments probe quantum matter using recent results from my group. In the second part, I will focus on the strange metal phase of the cuprates, which features […]

Date : November 29, 2022, 16:00 CET Mihailo Čubrović (Institute of Physics Belgrade) Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Factorization versus chaos in the IKKT matrix model Abstract: I discuss the problem of factorization and its relation to quantum chaos in the framework of Type IIB matrix model (IKKT matrix model). Euclidean partition functions for the fluctuations of D-brane stacks […]

Date : November 22, 2022, 16:00 CET Brian Swingle (Brandeis University) Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Cosmology as a holographic wormhole Abstract: We argue that standard tools of holography can be used to describe fully non-perturbative microscopic models of cosmology in which a period of accelerated expansion may result from the positive potential energy of time-dependent scalar fields evolving […]

Date : November 15, 2022, 14:00 CET Makoto Natsuume (KEK, Japan) Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Holographic Meissner effect Abstract: The holographic superconductor is the holographic dual of superconductivity, but there is no Meissner effect in conventional holographic superconductors. This is because the boundary Maxwell field is added as an external source and is not dynamical. We explain how […]

Date : November 8, 2022, 16:00 CET Jácome Armas (University of Amsterdam ) Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Towards a hydrodynamic theory for condensed matter systems Abstract: I will discuss a new hydrodynamic theory that accounts for pinning, phase, and momentum relaxation effects due to translational disorder, diffusion due to the presence of interstitials and vacancies, and strain relaxation […]

Date : November 1, 2022, 16:00 CET Alexandre Serantes (University of Barcelona) Link: https://zoom.us/j/98260147834?pwd=VW5BQStqUGUrUFFzWG1jL2tuWXJoZz09 Relativistic hydrodynamics: a singulant perspective Abstract: The formulation of relativistic hydrodynamics in an effective field theory language rests on a gradient expansion around local thermal equilibrium. Until recently, our understanding of the large-order behavior of this gradient expansion was restricted to two […]