Radio Frequency Spectroscopy of a Strongly Imbalanced Feshbach-Resonant Fermi Gas

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Radio Frequency Spectroscopy of a Strongly Imbalanced Feshbach-Resonant Fermi Gas

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Title: Radio Frequency Spectroscopy of a Strongly Imbalanced Feshbach-Resonant Fermi Gas
Author: Veillette, Martin; Moon, Eun Gook; Lamacraft, Austen; Radzihovsky, Leo; Sachdev, Subir; Sheehy, D. E.

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Citation: Veillette, Martin, Eun Gook Moon, Austen Lamacraft, Leo Radzihovsky, Subir Sachdev, and D. E. Sheehy. 2008. Radio frequency spectroscopy of a strongly imbalanced Feshbach-resonant Fermi gas. Physical Review A 78(3): 033614.
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Abstract: A sufficiently large species imbalance (polarization) in a two-component Feshbach resonant Fermi gas is known to drive the system into its normal state. We show that the resulting strongly-interacting state is a conventional Fermi liquid, that is, however, strongly renormalized by pairing fluctuations. Using a controlled 1/N expansion, we calculate the properties of this state with a particular emphasis on the atomic spectral function, the momentum distribution functions displaying the Migdal discontinuity, and the radio frequency (RF) spectrum. We discuss the latter in the light of the recent experiments of Schunck et al. (Science 316, 867 (2007)) on such a resonant Fermi gas, and show that the observations are consistent with a conventional, but strongly renormalized Fermi-liquid picture.
Published Version: doi:10.1103/PhysRevA.78.033614
Other Sources: http://arxiv.org/abs/0803.2517
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:7470490

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  • FAS Scholarly Articles [7495]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

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