High Energy Theory seminar
Lara Anderson, Virgina Tech
Condensed Matter seminar: "Phonon superconductivity and Landau levels of the twisted bilayer graphene"
Biao Lian, Princeton University
The twisted bilayer graphene (TBG) near the magic twist angle 1.05 degrees is known to have extremely flat electron bands, and exhibits both superconductivity and correlated insulating phases. In the first part, we…
Condensed Matter seminar: "Quantum Many-Body Physics Beyond Ground States"
Thomas Iadecola, University of Maryland
Recently a set of traditional assumptions in quantum condensed matter theory has been upended by the realization that many-body systems can host stable quantum phenomena at infinite temperature. I will discuss…
Astronomy seminar: "Detecting IGM structures in the very early Universe: Status, challenges, and new approaches"
Nithya Thyagarajan (NRAO)
Direct detection of evolving neutral Hydrogen structures from the Cosmic Dawn and Reionization Epochs (EoR) will reveal the nature of the first stars and galaxies as well as complete our understanding of a…
High Energy Theory seminar: "Higgs Couplings at High Scales"
Tao Han, University of Pittsburgh
Experiments at the LHC have been improving the measurements of the Higgs boson properties, and the searches for new physics are being actively conducted. In the absence of deviations from the Standard Model thus far…
Condensed Matter seminar: "Excitons in Flatland: Exploring and Manipulating Many-body Effects on the Optical Excitations in Quasi-2D Materials"
Diana Qiu, Lawrence Berkeley Laboratory
Since the isolation of graphene in 2004, atomically-thin quasi-two-dimensional (quasi-2D) materials have proven to be an exciting platform for both applications in novel devices and exploring fundamental phenomena…
Condensed Matter seminar: "Strange quantum matter: Fermi surfaces sans Fermi liquids"
Debanjan Chowdhury, Massachusetts Institute of Technology
The concept of electronic quasiparticles, as introduced by Landau, is one of the cornerstones of the theory of quantum many-body systems. However, a growing number of recent experiments in strongly correlated quantum…
Astronomy seminar: "Dark Matter in Disequilibrium"
Mariangela Lisanti, Princeton University
The Gaia mission is in the process of mapping nearly 1% of the Milky Way’s stars. This data set is unprecedented and provides a unique view into the formation history of our Galaxy and its associated dark matter halo…
High Energy Theory seminar: "Holographic Entropy Cone with Time Dependence"
Bartek Czech, Tsinghua University
In the AdS/CFT correspondence, if a CFT state is dual to a semiclassical spacetime, its entanglement entropies (minimal surface areas) must obey certain inequalities. The best-known examples are the strong…