Feynman diagrams versus Fermi-gas Feynman emulator

K. Van Houcke, F. Werner, E. Kozik, N. Prokof'Ev, B. Svistunov, M. J.H. Ku, A. T. Sommer, L. W. Cheuk, A. Schirotzek, M. W. Zwierlein

Research output: Contribution to journalArticlepeer-review

169 Scopus citations


Precise understanding of strongly interacting fermions, from electrons in modern materials to nuclear matter, presents a major goal in modern physics. However, the theoretical description of interacting Fermi systems is usually plagued by the intricate quantum statistics at play. Here we present a cross-validation between a new theoretical approach, bold diagrammatic Monte Carlo 1-3, and precision experiments on ultracold atoms. Specifically, we compute and measure, with unprecedented precision, the normal-state equation of state of the unitary gas, a prototypical example of a strongly correlated fermionic system 4-6. Excellent agreement demonstrates that a series of Feynman diagrams can be controllably resummed in a non-perturbative regime using bold diagrammatic Monte Carlo.

Original languageEnglish (US)
Pages (from-to)366-370
Number of pages5
JournalNature Physics
Issue number5
StatePublished - May 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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