  Quantum walks have been employed widely to develop new tools for quantum
information processing recently. A natural quantum walk dynamics of interacting
particles can be used to implement efficiently the universal quantum
computation. In this work quantum walks of electrons on a graph are studied.
The graph is composed of semiconductor quantum dots arranged in a circle.
Electrons can tunnel between adjacent dots and interact via Coulomb repulsion,
which leads to entanglement. Fermionic entanglement dynamics is obtained and
evaluated.
