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- W2172134240 abstract "This paper presents studies of the universal properties of strongly interacting Fermi gases using Bragg spectroscopy. We focus on pair-correlations, their relationship to the contact C introduced by Tan, and their dependence on both the momentum and temperature. We show that short-range pair correlations obey a universal law, first derived by Tan through measurements of the static structure factor, which displays a universal scaling with the ratio of the contact to the momentum C/q. Bragg spectroscopy of ultracold 6Li atoms is employed to measure the structure factor for a wide range of momenta and interaction strengths, providing broad confirmation of this universal law. We show that calibrating our Bragg spectra using the f-sum rule leads to a dramatic improvement in the accuracy of the structure factor measurement. We also measure the temperature dependence of the contact in a unitary gas and compare our results to calculations based on a virial expansion." @default.
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- W2172134240 date "2011-01-10" @default.
- W2172134240 modified "2023-09-23" @default.
- W2172134240 title "Universal structure of a strongly interacting Fermi gas" @default.
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- W2172134240 doi "https://doi.org/10.1088/1742-6596/264/1/012013" @default.
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