Wayne M. Itano, James C. Bergquist, John J. Bollinger, Jonathan Mark Gilligan, Fred L. Moore, & Mark G. Raizen, Quantum projection noise: Population fluctuations in two-level systems, Physical Review A 47, 3554–3570 (1993). PDF Abstract:
Wayne M. Itano, James C. Bergquist, John J. Bollinger, Jonathan Mark Gilligan, Fred L. Moore, & Mark G. Raizen, Quantum projection noise: Population fluctuations in two-level systems, Physical Review A 47, 3554–3570 (1993). PDF