@phdthesis{4054,
  author = {Rabin Paudel},
  title = {Probing local quantities in a strongly interacting Fermi gas and the construction of an ultracold Fermi gas apparatus},
  abstract = {<p>The nature of the normal phase of an ultracold Fermi gas in the BCS-BEC crossover regime is an interesting and unresolved question. As interactions increase, while the many-body ground state remains a condensate of paired fermions, the normal state must evolve from a Fermi liquid to a Bose gas of molecules. In this thesis, I present a technique to spatially select a homogeneous sample from the center of a trapped gas to explore this crossover. Combining this technique with RF spectroscopy, we locally measure Tan\textquoterights contact as a function of temperature and compare to various many-body theories. In another experiment, we measure the distribution of single-particle energies and momenta for a normal gas across the BCS-BEC crossover. We find that the data fit well to a two-part function that includes a peak corresponding to fermionic quasi particles and an \textquotedblleftincoherent background\textquotedblright that is modeled using the dispersion of thermal molecules. I also describe the construction of a new-generation Fermi gas apparatus.</p>},
  year = {2017},
  volume = {Ph.D.},
  pages = {148},
  month = {2017-05},
  publisher = {University of Colorado Boulder},
  address = {Boulder, CO},
}