The Initiation of Correlation in Spontaneous Emission from a Few Atoms

海珍 趙

James Clemens, Levente Horvath, Barry C. Sanders +1 more

We study collective spontaneous emission from arbitrary distributions of N two-state atoms using quantum trajectory theory and without an a priori single-mode assumption. Assuming a fully excited initial state, we calculate the angular distribution of the average integrated intensity. We investigate the dependence of the angular distribution of emission on the geometry of the atomic distribution. The formalism is developed around an unravelling of the master equation in terms of source mode quantum jumps. A modified boson approximation is made to treat the many-atom case, where it is found that strong directional superradiance occurs for a few hundred to a few thousand atoms. In order to illustrate important differences between our model and single-mode models we consider shot-to-shot intensity fluctuations and angular correlations in the emitted intensity.

Pavel A Apanasevich, S. Ya. Kilin

I. R. Senitzky

It is shown that phase correlation exists between two consecutive spontaneous-emission processes of an atom—although the phase in each individual process is random—when the atom is initially in a coherent superposition of the top and bottom levels. This correlation persists even when the two emission processes are separated by a finite time interval.

G.E. Notkin, Sergey G. Rautian, A. A. Feoktistov

Vladimír Bužek