Shiwei Zhang, Flatiron Institute: Magnetic orders, stripes, and superconductivity-insights from computations on the Hubbard model

  • Starts: 11:00 am on Friday, February 17, 2023
  • Ends: 12:00 pm on Friday, February 17, 2023
The Hubbard model is fundamental to quantum many-body physics. Since the discovery of high-temperature superconductivity, it has been a focal point in condensed matter and more recently also in the field of ultracold atoms. The properties of the two-dimensional Hubbard model are often the outcome of a delicate balancing act between multiple competing or co-existing tendencies. This makes it extremely demanding for computational approaches to determine the properties - and make predictions (e.g., as a function of parameter values) which can serve as a guide to theory and experiments. Recently, significant progress has been made via advances in algorithms and the combined use of complementary methods in a multi-messenger manner. I will discuss some of these developments, what they have revealed about the physics of the Hubbard model, and the prospect of accurate and systematic computations in more realistic quantum systems.
SCI 352
Shiewei Zhang
Flatiron Institute of NYC
Anders Sandvik