High-precision quantum many-body physics based on diagrammatic simulation techniques
 Title: High-precision quantum many-body physics based on diagrammatic simulation techniques SNIC Project: SNIC 2021/5-435 Project Type: SNIC Medium Compute Principal Investigator: Johan Carlström Affiliation: Stockholms universitet Duration: 2021-09-28 – 2022-10-01 Classification: 10304 Homepage: https://www.su.se/english/profiles/joca6685-1.342701 Keywords:

## Abstract

Computational techniques based on stochastic sampling of Feynman diagrams have made is possible to obtain virtually exact results for macroscopic systems of interacting fermions. In this project, {\it diagrammatic Monte Carlo} simulations will be employed to address correlations effects in topological systems. Using an alternative representation of the series expansion, this method will also be extended to the strongly correlated regime. This is a class of systems for which efficient numerical techniques currently are missing.