Cooperative spontaneous emission ofNatoms: Many-body eigenstates, the effect of virtual Lamb shift processes, and analogy with radiation ofNclassical oscillators Academic Article uri icon

abstract

  • We consider collective emission of a single photon from a cloud of N two-level atoms (one excited, N-1 ground state). For a dense cloud the problem is reduced to finding eigenfunctions and eigenvalues of an integral equation. We discuss an exact analytical solution of this many-atom problem for a spherically symmetric atomic cloud. Some eigenstates decay much faster then the single atom decay rate, while the others undergo very slow decay. We show that virtual processes yield a small effect on the evolution of rapidly decaying states. However, they change the long time dynamics from exponential decay into a power-law behavior which can be observed experimentally. For trapped states virtual processes are much more important yielding additional decay channels which results in a slow decay of the otherwise trapped states. We also show that quantum mechanical treatment of spontaneous emission of weakly excited atomic ensemble is analogous to emission of N classical harmonic oscillators. 2010 The American Physical Society.

published proceedings

  • Physical Review A

author list (cited authors)

  • Svidzinsky, A. A., Chang, J., & Scully, M. O.

citation count

  • 170

complete list of authors

  • Svidzinsky, Anatoly A||Chang, Jun-Tao||Scully, Marlan O

publication date

  • May 2010