Speaker: David Weld of UCSB Location: Bloomberg 462 Title: Probing quantum dynamics with strongly driven ultracold atoms Abstract: Degenerate gases in modulated optical potentials are a flexible testbed for the experimental study of quantum matter driven far from equilibrium. I will present results from a sequence of recent experiments in this area, on topics ranging from […]
Speaker: Mark Rudner (U Washington) “Dynamical quantum materials” When pushed out of equilibrium, quantum materials can host interesting types of internal fields -- dc or ac electric fields, currents, etc., -- that cannot persist in equilibrium. Feedback of these potentially very strong fields on the material's underlying band structure and quantum geometry can lead to […]
Speaker: Tomoya Higo of U. Tokyo Title: Electrical manipulation and detection of topological states in heterostructures based on the Weyl antiferromagnet Mn3Sn Abstract: Various elementary particles previously proposed in high-energy physics are now being observed as quasiparticles in solids, garnering significant attention. Recently, the existence of Weyl fermions/Weyl semimetal states, stemming from the macroscopic time-reversal […]
Speaker: William D. Ratcliff of NIST Title: "Applications of Artificial Intelligence to Neutron Scattering” Abstract: Neutron scattering is a versatile technique for studying the structure and dynamics of materials. Unfortunately, there are a limited number of neutron sources available in the world to perform scientific experiments. In this talk, I will discuss the use of […]
Host: Yaojun Zhang
Special Condensed Matter Seminar Speaker: Allen Scheie Title: "The old and the new: Probing elemental gadolinium and quantum entanglement with neutron scattering" Abstract: Doing experiments on quantum materials often not nearly as hard as interpreting those experiments. In this talk I discuss two projects where neutron scattering data was analyzed in a new way to […]
Title: New Pathways for Topological Flat Bands, and Roton Condensate in Fractional Quantum Anomalous Hall Systems Abstract: Recent studies on topological flat bands in moiré superlattices have revealed fascinating new phenomena, such as the fractional quantum anomalous Hall effect (FQAH). In this talk, we will discuss two interrelated topics: (1) new strategies for creating exact […]
Title: Moiré magnetism in twisted two-dimensional magnets Abstract: Moiré superlattice emerges from the interference between two mismatched atomic lattices, and it has led to tremendous success in designing and tailoring the electronic states in two-dimensional (2D) homo- and hetero-structures. Yet, the power of moiré superlattice in controlling the spin degree of freedom and thus modifying the magnetic states is much less […]
"Programmable Emulsions By Design" Presented by Jasna Brujic, a leading soft condensed matter experimentalist from NYU
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. […]