Single Atoms with 6000-Second Trapping Lifetimes in Optical-Tweezer Arrays at Cryogenic Temperatures

We report on the trapping of single $\mathrm{Rb}$ atoms in tunable arrays optical tweezers a cryogenic environment at approximately 4 K. describe design and construction experimental apparatus, based custom-made UHV-compatible closed-cycle cryostat with access. demonstrate tweezers, lifetimes up to 6000 s, despite fact that vacuum system has not been baked out. These results open way large extended coherence, for applications large-scale quantum simulation many-body systems and, more generally, science technology.