Quantum Information Processing Using Local Control of Exchange in 1D Nanotubes

The overall project aimed to develop gated nanotubes and nanowires to be used in the development of spin qubits arranged in a 1D array. Nanotube circuits with gate-confined single and double dots were realized, shell-core nanowire growth methods were developed, gated nanowire circuits were fabricated, and double quantum dots, appropriate for singlet-triplet qubits, were investigated experimentally. We also investigated light emission from nanowires, to be of potential use in electron-photon coupled qubits. Theoretical work spanned the range from investigations of charge dephasing due to 1/f noise, quantum versus classical coupling to nuclear spins, and band mixing in graphene. Dozens of papers were published, several patents were filed, and several students received PhD degrees as a result of this funding.