Rydberg six-wave mixing process Junling Che, Jiaqi Ma, Huaibin Zheng, Zhaoyang Zhang, Xin Yao, Yiqi Zhang and Yanpeng Zhang EPL, 109 3 (2015) 33001 Published online: 19 February 2015 DOI: 10.1209/0295-5075/109/33001