Sigrist M, Fuhrer A, Ihn T, Ensslin K, Ulloa S E, Wegscheider W, Bichler M
Solid State Physics, ETH Zürich, 8093, Switzerland.
Phys Rev Lett. 2004 Aug 6;93(6):066802. doi: 10.1103/PhysRevLett.93.066802. Epub 2004 Aug 4.
The Aharonov-Bohm effect is measured in a four-terminal open ring geometry. Two quantum dots are embedded in the structure, one in each of the two interfering paths. The number of electrons in the two dots can be controlled independently. The transmission phase is measured as electrons are added to or taken away from the individual quantum dots. Although the measured phase shifts are in qualitative agreement with theoretical predictions, the phase evolution exhibits unexpected dependence on the magnetic field. Phase lapses are found only in certain ranges of the magnetic field.
阿哈罗诺夫 - 玻姆效应是在四端开环几何结构中测量的。结构中嵌入了两个量子点，分别位于两条干涉路径中的每一条上。两个量子点中的电子数可以独立控制。当电子被添加到单个量子点或从单个量子点中取出时，测量传输相位。尽管测量到的相移在定性上与理论预测一致，但相位演化表现出对磁场的意外依赖性。仅在磁场的某些范围内发现相位突变。
