Author(s): B. Casabone, K. Friebe, B. Brandstätter, K. Schüppert, R. Blatt, and T. E. Northup
Two groups have independently isolated two atoms in a single cavity and measured that the collective light output is not simply the sum of single emitters.
[Phys. Rev. Lett. 114, 023602] Published Wed Jan 14, 2015