@article{12065,
  author = {Lindsay Sonderhouse and Christian Sanner and Ross Hutson and Akihisa Goban and Thomas Bilitewski and Lingfeng Yan and William Milner and Ana Maria Rey and Jun Ye},
  title = {Thermodynamics of a deeply degenerate SU(N)-symmetric Fermi gas},
  abstract = {Many-body quantum systems can exhibit a striking degree of symmetry unparalleled by their classical counterparts. While in real materials SU(N) symmetry is an idealization, this symmetry is pristinely realized in fully controllable ultracold alkaline-earth atomic gases. Here, we study an SU(N)-symmetric Fermi liquid of 87Sr atoms, where N can be tuned to be as large as 10. In the deeply degenerate regime, we show through precise measurements of density fluctuations and expansion dynamics that the large N of spin states under SU(N) symmetry leads to pronounced interaction effects in a system with a nominally negligible interaction parameter. Accounting for these effects we demonstrate thermometry accurate to one-hundredth of the Fermi energy. We also demonstrate record speed for preparing degenerate Fermi seas, reaching T/TF=0.12 in under 3 s, enabled by the SU(N) symmetric interactions. This, along with the introduction of a new spin polarizing method, enables operation of a 3D optical lattice clock in the band insulating-regime.},
  year = {2020},
  journal = {Nature Physics},
  volume = {16},
  chapter = {1216},
  pages = {1216},
  month = {2020-08},
  url = {https://www.nature.com/articles/s41567-020-0986-6},
  doi = {10.1038/s41567-020-0986-6},
}