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 journalArticle

125 Scopus citations

Abstract

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
Volume8
Issue number5
DOIs
StatePublished - May 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Feynman diagrams versus Fermi-gas Feynman emulator'. Together they form a unique fingerprint.

  • Cite this

    Van Houcke, K., Werner, F., Kozik, E., Prokof'Ev, N., Svistunov, B., Ku, M. J. H., Sommer, A. T., Cheuk, L. W., Schirotzek, A., & Zwierlein, M. W. (2012). Feynman diagrams versus Fermi-gas Feynman emulator. Nature Physics, 8(5), 366-370. https://doi.org/10.1038/nphys2273