@phdthesis{Marolleau22_PhD,
  TITLE = {{Quantum atom optics with metastable helium atoms}},
  AUTHOR = {Marolleau, Quentin},
  URL = {https://pastel.hal.science/tel-04059502},
  NUMBER = {2022UPASP166},
  SCHOOL = {{Universit{\'e} Paris-Saclay --- Institut d’Optique Graduate
      School, Laboratoire Charles Fabry}},
  YEAR = {2022},
  MONTH = {12},
  KEYWORDS = {Quantum mechanics ; Nonlocality ; Metastable helium ; Atom
      interferometry ; Bell inequalities ; Ultra-Cold atoms ; Non localit{\'e}
      ; Atomes ultra-Froids ; M{\'e}canique quantique ; In{\'e}galit{\'e}s de
      Bell ; Interf{\'e}rom{\'e}trie atomique ; Helium m{\'e}tastable},
  TYPE = {PhD thesis},
  PDF = {https://pastel.hal.science/tel-04059502/file/117284_MAROLLEAU_2022_archivage.pdf},
  HAL_ID = {tel-04059502},
  HAL_VERSION = {v1},
  abstract = {Correlation and entanglement properties of multi-particle quantum
      states have been demonstrated since the 1980s in the context of
      photonics. Since then, the production and characterisation of
      non-classical states in various contexts has become a very fruitful
      research topic, as well as a burning issue for the development of quantum
      technologies. This thesis presents an experimental platform able to
      prepare helium atoms in strongly correlated momentum states. The
      detection technique that has been developed in our group
      (three-dimensional and resolved to the single atom) allows to efficiently
      probe these correlation properties, which is in general difficult to
      achieve for most similar experimental setups. In particular, this
      manuscript contains a first part of theoretical nature, which deals on
      the one hand with the generalisation of the Hong-Ou-Mandel effect (in a
      context where more than two particles are involved); and on the other
      hand with the implementation of an experiment testing the Bell
      inequalities for atoms entangled with respect to their velocities. Both
      experiments could be carried out by our team in the near future. A second
      experimental part reports on the recent progress made on the platform, as
      well as the latest experimental results concerning the correlation
      properties of the atomic source that we have set up.},
}