  A composite system of Majorana-hosted semiconductor nanowire and
superconducting flux qubit is inves- tigated. It is found that the coupling
between these two subsystems can be controlled electrically, supplying a
convenient method to implement {\pi}/8 phase gate of a Majorana-based
topological qubit. We also present a scheme to transfer information from the
flux qubit to the topological qubit using Landau-Zener transition. In addition,
a structure named top-flux-flux is proposed to retrieve the information stored
in the topological qubit. With the demonstration of the entanglement of two
topological qubits, it is very promising to do quantum information process with
this hybrid system.
