@misc{W2140322314,
  author = {Kevin Birnbaum and A. Boca and Ryan Miller and A. D. Boozer and Tracy E. Northup and H. J. Kimble},
  title = {Photon blockade in an optical cavity with one trapped atom},
  year = {2005},
  howpublished = {Nature},
  doi = {https://doi.org/10.1038/nature03804}
}