Exploiting quantum control for quantum computation in optical lattices: marker atoms and molecular interactions
by
Tommaso Calarco
University of Innsbruck, Institute for Theoretical Physics
Coauthors: U. Dorner, P. Julienne, C. Williams, and P. Zoller

We develop a scheme for quantum computation with neutral atoms, based on the concept of "marker" atoms, i.e., auxiliary atoms that can be efficiently transported in state-independent periodic external traps to operate quantum gates between physically distant qubits. Quantum control theory (Krotov's method) is used to optimize the fidelity of both atom transport and quantum gate operations. This allows for relaxing a number of experimental constraints for quantum computation with neutral atoms in microscopic potential, including single-atom laser addressability. We discuss the advantages of this approach in a concrete physical scenario involving molecular interactions.

Date received: April 30, 2004