Host: Yi Li Critical Filaments and Fractal-Mediated Superconductivity in Quasiperiodic Twisted Bilayer Graphene The electronic properties of quantum materials depend on the symmetry, topology, and spatial structure of electron wave functions. It was previously shown that superconductivity can be boosted by spatially rarified wave functions shaped by random or structured inhomogeneity. Recently, the twisting of […]
Title: Neutron studies of SrCu2(BO3)2 under extreme conditions–a fruit fly for quantum many body physics Abstract: Neutron spectroscopy offer a unique insight into the emergent quantum phases and entangled dynamics in quantum materials. A textbook example is offered by the compound SrCu2(BO3)2 realizing the theoretical Shastry-Sutherland model, which reveal a plethora of intriguing phenomena including: […]
Title: Tensor network simulation in strongly correlated systems: past, present and future Abstract: Tensor network states are new kinds of variational wavefunctions that help us to understand quantum phases and phase transitions beyond Landau paradigm. In this talk, I will first review the major development of tensor network simulation in the past two decades. […]
Title: “Topological Crystalline Markers for Rotational-Symmetric Insulators” Abstract: “Topological insulators are materials with unique properties, featuring gapless boundary modes despite having a gapped bulk. When translational symmetry is intact, their topologically non-trivial characteristics can be identified using momentum-space based topological invariants. Yet, challenges arise when bulk disorder and defects break translational symmetry, making momentum-space approaches […]
TITLE: Impact of primordial magnetic fields on matter power spectrum ABSTRACT: Primordial magnetic fields (PMFs) offer a simple explanation for the origin of galactic magnetic fields as well as of the purportedly detected magnetic fields in cosmic voids. In the talk, I discuss how PMFs' influence on structure formation can offer a complementary method to […]
Title: Entangled photons win the 2022 Nobel Prize! Abstract: The 2022 Nobel Prize in Physics was awarded to John Clauser, Alain Aspect, and Anton Zeilinger for experiments with entangled photons. This may have left you wondering, “What are entangled photons, and how does one actually do experiments with them?” In this talk I will discuss questions like these and, more broadly, […]
TITLE: Hot, Warm, Cold, and Frigid Exoplanets from the Nancy Grace Roman Space Telescope
TITLE: The Uses of Non-Invertible Symmetries and “Dualities" ABSTRACT: Non-invertible symmetries are all the rage these days. I will explain a variety of their applications. One use is to extend Kramers-Wannier duality to a large class of models, explaining exact degeneracies between non-(conventional) symmetry-related ground states as well as in the low-energy spectrum. Other applications […]
Talk titles will be available on the CAS wiki page.
Programming quantum materials with terahertz light Quantum materials often harbor emergent orders and phases that reveal themselves at low-energy scales, around 1 to 10 meV. To investigate these collective behaviors, we turn to the terahertz energy regime—a crucial window for probing and controlling quantum phenomena. In this talk, I will present our latest breakthroughs in […]
Title: The Thirty Meter Telescope and the World of Science
TITLE: Absolutely Mindboggling! ABSTRACT: The fractional quantum Hall states are among the most beautiful, the most consequential, and the best understood strongly correlated states discovered in nature. I will begin with a brief introduction to their rich phenomenology and explanation as a manifestation of the formation of a new kind of emergent particle called the […]