11:13 〜 11:15 [PS-9-15 (Late News)] Sensitive current measurement on a quantum antidot with a Corbino-type electrode ○T. Hata1, T. Uchino1, T. Akiho2, K. Muraki2, T. Fujisawa1 (1.Tokyo Inst. of Tech. (Japan), 2.NTT Basic Res. Labs. (Japan))