BUILDING BLOCKS FOR A SCALABLE QUANTUM INFORMATION PROCESSOR BASED ON TRAPPED IONS
Dietrich G. Leibfried, M. D. Barrett, Amit Ben-Kish, J. Britton, John Chiaverini, Brian DeMarco, Wayne M. Itano, Branislav M. Jelenkovic, John D. Jost, C. Langer, D. LUCAS, V. Meyer, Till Rosenband, M. A. Rowe, Tobias Schaetz, David J. Wineland · Laser Spectroscopy · 2004
VJe describe the underlying concept and experimental demonstration of the basic building bloclts of a scalable quantum information processor archikcture using trapped ion-clubits. The trap structure is divided into many subregions. In eacl~ several ion-qubits can be trapped in complete isolation from all the other ion-qubits in the system. In a particular subregion, ion-qubits can either be st,ored as memory or subjected to individual rotations or multi-qubit gates. The ion-qubits are'guided through the array by appropriately switching control electrode potentials. Excess energy that is gained through the motion of ion-qubits in the array or other heating mecha.nisrr~s can be removed by sympathetic cooling of the ion-qubits with another ion species. The proposed architecture can be used in a highly parallel fashion, an imporlanl prerequisite for fault-tolerant quantum computation.