Journal
PHYSICS LETTERS B
Volume 802, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2020.135247
Keywords
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Funding
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [279384907 - SFB 1245]
- US Department of Energy, the Office of Science, the Office of Nuclear Physics
- SciDAC [DE-SC00046548, DE-AC02-05CH11231]
- Alexander von Humboldt Foundation through a Feodor-Lynen Fellowship
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Using effective field theory methods, we calculate for the first time the complete fourth-order term in the Fermi-momentum or k(F)a(s) expansion for the ground-state energy of a dilute Fermi gas. The convergence behavior of the expansion is examined for the case of spin one-half fermions and compared against quantum Monte-Carlo results, showing that the Fermi-momentum expansion is well-converged at this order for vertical bar k(F)a(s)vertical bar less than or similar to 0.5. (C) 2020 The Author(s). Published by Elsevier B.V.
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