PIRSA:22120021

Learning the sign structures of quantum systems: is it hard or trivial?

Westerhout, T. (2022). Learning the sign structures of quantum systems: is it hard or trivial?. Perimeter Institute. https://pirsa.org/22120021

Westerhout, Tom. Learning the sign structures of quantum systems: is it hard or trivial?. Perimeter Institute, Dec. 02, 2022, https://pirsa.org/22120021 

          @misc{ pirsa_PIRSA:22120021,
            doi = {10.48660/22120021},
            url = {https://pirsa.org/22120021},
            author = {Westerhout, Tom},
            keywords = {Other},
            language = {en},
            title = {Learning the sign structures of quantum systems: is it hard or trivial?},
            publisher = {Perimeter Institute},
            year = {2022},
            month = {dec},
            note = {PIRSA:22120021 see, \url{https://pirsa.org}}
          }

Tom Westerhout

Radboud Universiteit Nijmegen

Talk number
PIRSA:22120021
Collection
Talk Type
Subject
Abstract

A well-established approach to solving interacting quantum systems is variational Monte Carlo. There is a lot of renewed interest in it since the introduction of neural networks as a highly expressive and unbiased variational ansatz. Similar to more traditional ansätze, neural networks struggle with solving frustrated quantum systems. A conjecture has been made that the cause of these difficulties lies in the sign structures of the ground state wavefunctions. Here, we will discuss these sign structures in more detail and try to analyze how complex they really are by establishing a connection to classical Ising models.

Zoom link:  https://pitp.zoom.us/j/99087954160?pwd=Vm5zWWRFbHBwVFR1RHZMc3ptem03QT09