@article{12048,
  author = {Yan Zhou and Yuval Shagam and William Cairncross and Kia Ng and Tanya Roussy and Tanner Grogan and Kevin Boyce and Antonio Vigil and Madeline Pettine and Tanya Zelevinsky and Jun Ye and Eric Cornell},
  title = {Second-Scale Coherence Measured at the Quantum Projection Noise Limit with Hundreds of Molecular Ions},
  abstract = {Cold molecules provide an excellent platform for quantum information, cold chemistry, and precision measurement. Certain molecules have enhanced sensitivity to beyond standard model physics, such as the electron’s electric dipole moment (eEDM). Molecular ions are easily trappable and are therefore particularly attractive for precision measurements where sensitivity scales with interrogation time. Here, we demonstrate a spin precession measurement with second-scale coherence at the quantum projection noise (QPN) limit with hundreds of trapped molecular ions, chosen for their sensitivity to the eEDM rather than their amenability to state control and readout. Orientation-resolved resonant photodissociation allows us to simultaneously measure two quantum states with opposite eEDM sensitivity, reaching the QPN limit and fully exploiting the high count rate and long coherence.},
  year = {2020},
  journal = {Phys. Rev. Lett.},
  volume = {124},
  chapter = {053201},
  pages = {053201},
  month = {2020-02},
  publisher = {American Physical Society},
  url = {https://link.aps.org/doi/10.1103/PhysRevLett.124.053201},
  doi = {10.1103/PhysRevLett.124.053201},
}