Dilute Fermi gas at fourth order in effective field theory
Abstract
Using effective field theory methods, we calculate for the first time the complete fourth-order term in the Fermi-momentum or $$κ_Fα_s$$ 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 $$|κ_Fα_s|≲0.5$$.
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC); German Research Foundation (DFG)
- OSTI Identifier:
- 1595185
- Alternate Identifier(s):
- OSTI ID: 1756615
- Grant/Contract Number:
- AC02-05CH11231; SC00046548; 279384907-SFB-1245
- Resource Type:
- Published Article
- Journal Name:
- Physics Letters. B
- Additional Journal Information:
- Journal Name: Physics Letters. B Journal Volume: 802 Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Wellenhofer, C., Drischler, C., and Schwenk, A.. Dilute Fermi gas at fourth order in effective field theory. Netherlands: N. p., 2020.
Web. doi:10.1016/j.physletb.2020.135247.
Wellenhofer, C., Drischler, C., & Schwenk, A.. Dilute Fermi gas at fourth order in effective field theory. Netherlands. https://doi.org/10.1016/j.physletb.2020.135247
Wellenhofer, C., Drischler, C., and Schwenk, A.. Sun .
"Dilute Fermi gas at fourth order in effective field theory". Netherlands. https://doi.org/10.1016/j.physletb.2020.135247.
@article{osti_1595185,
title = {Dilute Fermi gas at fourth order in effective field theory},
author = {Wellenhofer, C. and Drischler, C. and Schwenk, A.},
abstractNote = {Using effective field theory methods, we calculate for the first time the complete fourth-order term in the Fermi-momentum or $κ_Fα_s$ 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 $|κ_Fα_s|≲0.5$.},
doi = {10.1016/j.physletb.2020.135247},
journal = {Physics Letters. B},
number = C,
volume = 802,
place = {Netherlands},
year = {2020},
month = {3}
}
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https://doi.org/10.1016/j.physletb.2020.135247
https://doi.org/10.1016/j.physletb.2020.135247
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