Precise Determination of the Structure Factor and Contact in a Unitary Fermi Gas. Hoinka, S., Lingham, M., Fenech, K., Hu, H., Vale, C. J., Drut, J. E., & Gandolfi, S. Physical Review Letters, 110:055305+, American Physical Society, January, 2013. ![Precise Determination of the Structure Factor and Contact in a Unitary Fermi Gas [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex We present a high-precision determination of the universal contact parameter in a strongly interacting Fermi gas. In a trapped gas at unitarity, we find the contact to be 3.06±0.08 at a temperature of 0.08 of the Fermi temperature in a harmonic trap. The contact governs the high-momentum (short-range) properties of these systems, and this low-temperature measurement provides a new benchmark for the zero-temperature homogeneous contact. The experimental measurement utilizes Bragg spectroscopy to obtain the dynamic and static structure factors of ultracold Fermi gases at high momentum in the unitarity and molecular Bose-Einstein condensate regimes. We have also performed quantum Monte Carlo calculations of the static properties, extending from the weakly coupled BCS regime to the strongly coupled Bose-Einstein condensate case, that show agreement with experiment at the level of a few percent.
@article{Hoinka2013Precise,
abstract = {We present a high-precision determination of the universal contact parameter in a strongly interacting Fermi gas. In a trapped gas at unitarity, we find the contact to be 3.06±0.08 at a temperature of 0.08 of the Fermi temperature in a harmonic trap. The contact governs the high-momentum (short-range) properties of these systems, and this low-temperature measurement provides a new benchmark for the zero-temperature homogeneous contact. The experimental measurement utilizes Bragg spectroscopy to obtain the dynamic and static structure factors of ultracold Fermi gases at high momentum in the unitarity and molecular Bose-Einstein condensate regimes. We have also performed quantum Monte Carlo calculations of the static properties, extending from the weakly coupled BCS regime to the strongly coupled Bose-Einstein condensate case, that show agreement with experiment at the level of a few percent.},
added-at = {2014-01-09T15:14:33.000+0100},
author = {Hoinka, Sascha and Lingham, Marcus and Fenech, Kristian and Hu, Hui and Vale, Chris J. and Drut, Joaqu'in E. and Gandolfi, Stefano},
biburl = {http://www.bibsonomy.org/bibtex/2862d791899b4a54ac15966093f79c2af/jaspervh},
citeulike-article-id = {12132428},
citeulike-linkout-0 = {http://dx.doi.org/10.1103/physrevlett.110.055305},
doi = {10.1103/physrevlett.110.055305},
interhash = {f7d3be42a2f60c8022b856eed01dca41},
intrahash = {862d791899b4a54ac15966093f79c2af},
journal = {Physical Review Letters},
keywords = {fermi\_gases, unitarity},
month = jan,
pages = {055305+},
posted-at = {2013-03-10 16:05:13},
priority = {2},
publisher = {American Physical Society},
timestamp = {2014-01-09T15:14:33.000+0100},
title = {Precise Determination of the Structure Factor and Contact in a Unitary Fermi Gas},
url = {http://dx.doi.org/10.1103/physrevlett.110.055305},
volume = 110,
year = 2013
}
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