Liebisch T Cubel, Reinhard A, Berman P R, Raithel G
FOCUS Center and Michigan Center for Theoretical Physics, Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
Phys Rev Lett. 2005 Dec 16;95(25):253002. doi: 10.1103/PhysRevLett.95.253002. Epub 2005 Dec 13.
We show that the probability distributions for the number of Rydberg excitations in small ensembles of cold atoms, excited using short (100 ns) laser pulses, can be highly sub-Poissonian. The phenomenon occurs if the atom density and the principal quantum number of the excited Rydberg level are sufficiently high. Our observations are attributed to a blockade of the Rydberg atom excitation.
我们表明，使用短（100纳秒）激光脉冲激发的冷原子小集合体中里德堡激发数的概率分布可以是高度亚泊松分布的。如果原子密度和激发的里德堡能级的主量子数足够高，就会出现这种现象。我们的观察结果归因于里德堡原子激发的阻塞。
