Supplementary information

From the following article

Conditional control of the quantum states of remote atomic memories for quantum networking

D. Felinto, C. W. Chou, J. Laurat, E. W. Schomburg, H. de Riedmatten and H. J. Kimble

Nature Physics 2, 844 - 848 (2006)

doi:10.1038/nphys450