Precision Bragg spectroscopy of the density and spin response of a strongly interacting Fermi gas

Gases of neutral atoms cooled to nanoKelvin temperatures exhibit remarkable behaviour such as superfluidity in which particles can flow indefinitely with zero friction. Superfluids made of fermionic particles are especially interesting as they occur in a variety of settings from neutron stars to superconductors; however, many of their physical properties are difficult to predict theoretically. This thesis presents experimental measurements of the universal contact parameter for a Fermi gas with strong interactions which characterizes the many-body properties of the system and secondly the spin susceptibility which describes how the system responds to magnetic fields. These results further our understandings of strongly interacting quantum systems.