@article{oai:repo.qst.go.jp:00077562,
 author = {Haruyama, Moriyoshi and Onoda, Shinobu and Higuchi, Taisei and Kada, Wataru and Chiba, Atsuya and Hirano, Yoshimi and Teraji, Tokuyuki and Igarashi, Ryuji and Kawai, Sora and Kawarada, Hiroshi and Ishii, Yu and Fukuda, Ryosuke and Tanii, Takashi and Isoya, Junichi and Ohshima, Takeshi and Hanaizumi, Osamu and Moriyoshi, Haruyama and Shinobu, Onoda and Taisei, Higuchi and Atsuya, Chiba and Yoshimi, Hirano and Ryuji, Igarashi and Yu, Ishii and Fukuda, Ryosuke and Takeshi, Ohshima},
 journal = {Nature Communications},
 month = {Jun},
 note = {Quantum information processing requires quantum registers based on coherently interacting quantum bits. The dipolar couplings between nitrogen vacancy (NV) centres with nanometre separation makes them a potential platform for room-temperature quantum registers. The fabrication of quantum registers that consist of NV centre arrays has not advanced beyond NV pairs for several years. Further scaling up of coupled NV centres by using nitrogen implantation through nanoholes has been hampered because the shortening of the separation distance is limited by the nanohole size and ion straggling. Here, we demonstrate the implantation of C5N4Hn from an adenine ion source to achieve further scaling. Because the C5N4Hn ion may be regarded as an ideal point source, the separation distance is solely determined by straggling. We successfully demonstrate the fabrication of strongly coupled triple NV centres. Our method may be extended to fabricate small quantum registers that can perform quantum information processing at room temperature.},
 title = {Triple nitrogen-vacancy centre fabrication by C5N4Hn ion implantation},
 volume = {10},
 year = {2019}
}