Single atom array to form a Rydberg ring*

Single atom arrays are ideal quantum systems for studying few-body quantum simulation and quantum computation [1]. Towards realizing a fully controllable array we did a lot of experimental efforts, which include rotating single atoms in a ring optical lattice generated by a spatial light modulator [2], high efficient loading of two atoms into a microscopic optical trap by dynamically reshaping the trap with a spatial light modulator [3], and trapping a single atom in a blue detuned optical bottle beam trap [4]. Recently, we succeeded in trapping up to 6 atoms in a ring optical lattice with one atom in each site. Further laser cooling the array and manipulation of the inner states will provide chance to form Ryberg rings for quantum simulation. \\[4pt] [1] M. Saffman et al., Rev. Mod. Phys. 82, 2313 (2010)\\[0pt] [2] X.D. He et al., Opt. Express 17, 21014 (2009)\\[0pt] [3] X.D. He et al., Opt. Express 18, 13586 (2010)\\[0pt] [4] P. Xu et al., Opt. Lett. 35, 2164 (2010)