Author Affiliations

E. Togan,^1,* Y. Chu,¹ A. S. Trifonov,¹ L. Jiang,^1,2,3 J. Maze,¹ L. Childress,^1,4 M. V. G. Dutt,^1,5 A. S. Sørensen,⁶ P. R. Hemmer,⁷ A. S. Zibrov,¹ A. Imamoglu,⁸ and M. D. Lukin¹

¹Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA

²Department of Physics, California Institute of Technology, Pasadena, California 91125, USA

³Institute for Quantum Information, California Institute of Technology, Pasadena, California 91125, USA

⁴Department of Physics and Astronomy, Bates College, Lewiston, Maine 04240, USA

⁵Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA

⁶QUANTOP, The Niels Bohr Institute, University of Copenhagen, DK2100 Copenhagen, Denmark

⁷Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77843, USA

⁸Institute for Quantum Electronics, ETH-Zurich, CH-8093, Switzerland

^*Corresponding author: togan@fas.harvard.edu