  The ability to transport single electrons on a quantum dot array dramatically
increases the freedom in designing quantum computation schemes that can be
implemented on solid-state devices. So far, however, routing schemes to
precisely control the transport paths of single electrons have yet to be
established. Here, we propose a silicon single-electron router that transports
pumped electrons along the desired route on the branches of a T-shaped quantum
dot array by inputting a synchronous phase-controlled signal to multiple gates.
Notably, we show that it is possible to achieve a routing accuracy above 99% by
implementing assist gates in front of the branching paths. The results suggest
new possibilities for fast and accurate transport of single electrons on
quantum dot arrays.
