Effect of pairwise dipole-dipole interaction among three-atom systems

Abstract

We present an analysis of a system of three two-level atoms interacting with one another through dipole-dipole interaction. The interaction manifests between the excited state of one of the atoms and the ground state of its nearest neighbour. Steady-state populations of the density matrix elements are presented and are compared with a situation when only two atoms are present. It can be noticed that the third atom modifies the behaviour of the three atoms. Two configurations are analysed, one in which the three atoms are in a line, with no interaction between atoms at the end points and the other in which the atoms form a closed loop with one atom interacting with both its neighbours. © 2014 Indian Academy of Sciences.