In 1999 Yasunobu Nakamura and his coworkers at NEC in Japan demonstrated coherence in a sliver of aluminum separated a short distance by an insulator from another piece of aluminum.

• 1999年，日本电气株式会社（NEC）的中村泰信与其同僚，便利用绝缘体将两片铝隔开一小段距离而展示了同调性。