Scalable universal holonomic quantum computation realized with an adiabatic quantum data bus and potential implementation using superconducting flux qubits

In this paper we examine the use of an adiabatic quantum data transfer protocol to build a universal quantum computer. Single-qubit gates are realized by using a bus protocol to transfer qubits of information down a spin chain with a unitary twist. This twist arises from altered couplings on the chain corresponding to unitary rotations performed on one region of the chain. We show how a controlled-NOT gate can be realized by using a control qubit with Ising-type coupling. The method discussed here can be extended to nonadiabatic quantum bus protocols. We also examine the potential of realizing such a quantum computer by using superconducting flux qubits. DOI: 10.1103/PhysRevA.87.042321