内容：
Optical lattices and tweezers have led to a series of breakthroughs in quantum simulation and computing with cold atoms. However, optical lattices provide excellent scalability but limited local control, whereas optical tweezers allow flexible and precise manipulation of individual atoms but are limited in system size by the finite field of view of the objective lens.
In this talk, I will present a hybrid optical lattice-tweezer platform for ultracold ytterbium atoms that are benefitted from the large-scale scalability of optical lattices and the precise control offered by optical tweezers. Our approach enables the preparation and control of scalable atomic arrays with high flexibility for quantum simulation of topological phases and many-body phenomena. I will report a two-color magneto-optical trap for ytterbium atoms and rapid optical transport to quantum degeneracy using a moving optical lattice. I will also describe the underlying mechanisms of shielding against atom loss and phase synchronization respectively. Furthermore, I introduce a scheme to explore large Chern numbers by Thouless pumping in optical Floquet quasicrystals based on the moving lattice.
Finally, I will discuss our recent progress in fast quantum gas microscopy. In contrast to conventional fluorescence imaging, which typically requires exposure times on the order of tens of milliseconds, our approach achieves site-resolved detection with microsecond-scale exposure times. Beyond conventional parity-projection measurements that infer multiple occupancy indirectly, our method enables direct detection of multiple atoms in a single lattice site, paving the way for studying quantum many-body dynamics with high temporal and spatial resolution.
Reference
[1] Two-color magneto-optical trapping of ytterbium atoms, Phys. Rev. Applied, 24, 044039, 2025, X. Li, Y. Wang, L. Yu, B. Song.
[2] Optical transport of cold atoms to quantum degeneracy, arXiv:2602.14249, Y. Tao, Y. Wang, L. Yu, B. Song.
