title: Universal behavior of pair correlations in a strongly interacting Fermi gas.
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 C/q. Bragg spectroscopy of ultracold 6Li 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.
authors.affiliation: ARC Centre of Excellence for Quantum-Atom Optics, Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122, Australia.
authors.forename: E D
authors.initials: ED
authors.lastname: Kuhnle
authors.forename: H
authors.initials: H
authors.lastname: Hu
authors.forename: X-J
authors.initials: XJ
authors.lastname: Liu
authors.forename: P
authors.initials: P
authors.lastname: Dyke
authors.forename: M
authors.initials: M
authors.lastname: Mark
authors.forename: P D
authors.initials: PD
authors.lastname: Drummond
authors.forename: P
authors.initials: P
authors.lastname: Hannaford
authors.forename: C J
authors.initials: CJ
authors.lastname: Vale