Quantum Computation with Graphene Nanostructure

Abstract

A review on the potential to implement spin-based quantum computation on graphene nanostructures. Two alternative approaches that the localized states can exist in the zigzag region of a graphene nanoribbon (GNR) with a sequence of Z-shaped structures or substrate modulated graphene quantum dot are proposed. The localized electron (hole) spin states can be used, as the phys. qubit. For the GNR quantum dot chain, the interaction between qubits is found to be of the always-on Heisenberg form. Moreover, for a practical quantum computer to operate, it is essential to properly tailor the disturbing environment. An important technique for doing this is the use of quantum bang-bang control strategy and the decoherence-free subspaces encoding method. These ideas are introduced to construct an effective quantum information circuit in new graphene nanostructures. [on SciFinder(R)]