Quantum Science with ultracold atoms on a 50 nm Scale

The unfilled f-shell of dysprosium not only gives the largest dipole moment among the periodic table but also gives the ground state of dysprosium high angular momentum. This makes dysprosium an excellent candidate for spin-dependent optical potential. Such spin-dependent optical potentials enable us manipulate spin-up/spin-down atoms independently and we can place them on a separation of 50 nm! The dipolar interactions can be as high as 20 kHz and have been observed by our group (arxiv:2302.07209)! Next, we are building up a spin-dependent optical tweezer system, placing two single atoms with nanometers distance and explore superradiance!