Speaker
Description
Ultracold mixtures involving highly magnetic atoms such as Er+Li, Dy+K, Cr+Li, and Er+Yb have already been realized for studying exotic quantum many-body phases. Such mixtures also open the way for the formation of ultracold diatomic molecules having both significant magnetic and electric dipole moments. Molecules involving atoms with large orbital angular momenta, such as Dy and Er, have a prohibitively complex internal structure with chaotic rovibrational spectra. In contrast, molecules involving highly magnetic symmetric atoms such as Cr or Eu may form exotic doubly polar molecules with easier-to-predict structures. On the other hand, molecules involving electronegative coinage metals such as Ag and alkali-metal atoms should possess very large permanent electric dipole moments.
In my talk, I will present several classes of highly polar and paramagnetic diatomic molecules, which can be produced at ultralow temperatures from laser-cooled ultracold atoms. I will show a new mechanism of useful Feshbach resonances in Cr+Yb mixtures [1] and the application of ground-state YbCr molecules for new physics searches [2], a recent experimental realization of weakly-bound LiCr molecules and our theoretical prediction of transferring them to the absolute ground state [3], as well as all-optical formation schemes of highly polar KAg and CsAg molecules [4]. Finally, I will discuss the possible application of ultracold highly polar and paramagnetic diatomic molecules in studying controlled collisions and chemical reactions and using them for precision measurements, quantum simulations, and quantum computing.
References:
[1] M. D. Frye, P. S. Żuchowski, M. Tomza, Phys. Rev. Research 6, 023254 (2024)
[2] A. Ciamei, A. Koza, M. Gronowski, M. Tomza, arxiv (2025)
[3] S. Finelli, A. Ciamei, B. Restivo, M. Schemmer, M. Inguscio, A. Trenkwalder, K. Zaremba-Kopczyk, M. Gronowski, M. Tomza, M. Zaccanti, PRX Quantum 5, 020358 (2024)
[4] M. Śmiałkowski, M. Tomza, Phys. Rev. A 103, 022802 (2021)
