The existence of fractional charges carrying the current is experimentallydemonstrated. Using a 2-D electron system in high magnetic field, we measurethe shot noise associated with tunneling in the fractional quantum Hall regimeat Landau level filling factor 1/3. The noise gives a direct determination ofthe quasiparticle charge, which is found to be e*=e/3 as predicted by Laughlin.The existence of e/3 Laughlin quasiparticles is unambiguously confirmed by theshot noise to Johnson-Nyquist noise cross-over found for temperature e*V/2k.
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机译：实验证明了载有电流的分数电荷的存在。使用强磁场中的二维电子系统，我们测量了与分数量子霍尔态朗道能级填充因子1/3中的隧穿有关的散粒噪声。噪声直接确定了准粒子的电荷，如劳克林所预测的那样，发现准电荷为e * = e /3。e/ 3劳克林准粒子的存在明确地由约翰逊·奈奎斯特噪声交叉点的杂散噪声证实。温度e * V / 2k。
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