The fish surfs on the wave
In a sample, this wave moves, for example, from left to right through the quantum dot at the velocity of sound inside the crystal at three kilometres per second. Its height is adjusted so that it extracts exactly one "fish" from it. The latter subsequently surfs on the wave in a one-dimensional channel. The "fish" arrives at the neighbouring quantum dot 4 μm to the right thereof. The researchers were able to attain good statistics by repetition of the waves and measurements and thus capable of determining the reliability of the method. During the first experiments, the probability of emission and detection of a single electron with the wave was 96 and 92%, respectively.
The innovation: aligning the fish
It is not possible to differentiate between the electrons "fish", but they can be differently aligned because they rotate like little spinning tops. This is called the "spin" of the electron. For example one can
|Contact: Prof. Dr. Andreas Wieck|