2017: 51-atom H. Bernien, 2017.
2021: 256-atom S. Ebadi, 2021. 100-atom era!
2022: 289-atom S. Ebadi, 2022.
2009: 2-atom
E. Urban, 2009. Spring Nature.
A. Gaëtan, Y. Miroshnychenko, T. Wilk, A. Chotia, M. Viteau, D. Comparat, P. Pillet, A. Browaeys, and P. Grangier, Observation of Collective Excitation of Two Individual Atoms in the Rydberg Blockade Regime, Nature Phys 5, 115 (2009). (Institut d’Optique) E. Urban, T. A. Johnson, T. Henage, L. Isenhower, D. D. Yavuz, T. G. Walker, and M. Saffman, Observation of Rydberg Blockade between Two Atoms, Nature Phys 5, 110 (2009). (U. Wisconsin)
H. Labuhn, 2016, Springer Nature.