Universal behavior of pair correlations in a strongly interacting Fermi gas.
E. D. Kuhnle,Hui Hu,Xia-Ji Liu,Paul Dyke,M. Mark,Peter D. Drummond,Peter Hannaford,Chris J. Vale +7 more
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It is shown that short-range pair correlations in a strongly interacting Fermi gas follow a simple universal law described by Tan's relations, which is achieved through measurements of the static structure factor which displays a universal scaling proportional to the ratio of Tan's contact to the momentum C/q.Abstract:
We show that short-range pair correlations in a strongly interacting Fermi gas follow a simple universal law described by Tan's relations. This is achieved through measurements of the static structure factor which displays a universal scaling proportional to the ratio of Tan's contact to the momentum $\mathcal{C}/q$. Bragg spectroscopy of ultracold $^{6}\mathrm{Li}$ atoms from a periodic optical potential is used to measure the structure factor for a wide range of momenta and interaction strengths, providing broad confirmation of this universal law. We calibrate our Bragg spectra using the $f$-sum rule, which is found to improve the accuracy of the structure factor measurement.read more
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Fermi gases in one dimension: From Bethe ansatz to experiments
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Momentum sharing in imbalanced Fermi systems
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Time-Dependent Impurity in Ultracold Fermions: Orthogonality Catastrophe and Beyond
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References
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