The development of methods for coherent manipulation of single isolated molecular ions [1,2,3] has made rapid progress in recent years with exciting applications in the fields of precision spectroscopy, fundamental-physics-theories tests, atomic clocks and quantum-controlled chemistry.
In this talk, I will describe our advances for achieving quantum control over a single N2+ molecular ion. In our experiment, we overlap a molecular beam with a radio-frequency ion trap. We ionize single nitrogen molecules into a specific rotational-vibrational state and subsequently trap them in the ion trap. We use a co-trapped atomic ion (Ca+) for ground-state cooling and for molecular-state detection by entangling the molecular state with the atomic-ion motion via their strong Coulomb interaction. We are developing a narrow quantum-cascade laser to perform mid-infra-red precision spectroscopy on a dipole-forbidden vibrational transition.
While we use N2+ as a prototype molecule our methods can be extended to a general class of diatomic and polyatomic molecules.
 F. Wolf et al., Nature 530, 457 (2016).
 C. W. Chou et al., Nature 545, 203 (2017).
 Z. Meir, G. Hegi, K. Najafian, M. Sinhal and S. Willitsch, Faraday Discussions (2019). DOI:10.1039/C8FD00195B
Fig: Radio-frequency ion trap used in our experiment for the purpose of coherent control of single molecular ions.
Host: Nir Navon (email@example.com)