Robust manipulation of atomic qubits using composite pulses

Scalable quantum computing relies on the development of techniques for robust and accurate qubit manipulation. We report on experimental progress in using composite pulses to provide accurate single qubit rotations that are insensitive to experimental errors in pulse area. The experiments use optically trapped cold Rb atoms that are manipulated by stimulated Raman transitions between hyperfine qubit states. The Raman laser system has fast amplitude and phase control electronics that allow arbitrary composite pulse sequences to be implemented at a rate of several MHz. Using this system we demonstrate the use of composite pulses for manipulation of trapped atomic qubits.