Feynman diagrams versus Fermi-gas Feynman emulator
Name
Zwierlein_Feynman diagrams.pdf
Size
408.9 KB
Format
Adobe PDF
Checksum (MD5)
2ab3c780b45c4946d3362ecf0e9a893c
Author(s)
Sommer, Ariel Tjodolv
Cheuk, Lawrence W.
Zwierlein, Martin Wolfram
Houcke, K. Van
Werner, F.
Kozik, E.
Prokofev, N.
Svistunov, B.
Schirotzek, A.
Ku, Mark J. H.
Date Issued
March 2012
Journal
Nature Physics
Publisher
Nature Publishing Group
Citation
Van Houcke, K. et al. “Feynman Diagrams Versus Fermi-gas Feynman Emulator.” Nature Physics 8.5 (2012): 366–370.
Version
Author's final manuscript
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 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. Excellent agreement demonstrates that a series of Feynman diagrams can be controllably resummed in a non-perturbative regime using bold diagrammatic Monte Carlo.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
MIT-Harvard Center for Ultracold Atoms
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/nphys2273
