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Like fish on waves: electrons go surfing
Date:9/22/2011

align a fish with "its head upwards," let it be transported with the wave, and then detect it again at the target quantum dot still having "its head upwards." The time for the spin to change is longer than the surfing time on the wave, so the probability of this occurring is very high. The quantum bits of the future will also consist of such spin-polarized electrons. The researchers attained their results with samples prepared by so-called molecular beam epitaxy at the chair of Applied Solid State Physics at the Ruhr University Bochum. They were structured in Tokyo and subsequently measured in Grenoble. But not only the samples, also a further development of this concept originates from Bochum: Prof. Wieck already published his vision of an electron directional coupler with two parallel one-dimensional channels, in which the electrons can skip from one to the other channel, 21 years ago. The research team has in the meantime realized this vision based on the results presented here. A further publication is therefore to follow shortly.


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Contact: Prof. Dr. Andreas Wieck
andreas.wieck@rub.de
49-234-322-6726
Ruhr-University Bochum
Source:Eurekalert

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