Steady state behaviour in atomic three-level lambda and ladder systems with incoherent population pumping

Details Steady state behaviour in atomic three-level lambda and ladder systems with incoherent population pumping Steady state behaviour in atomic three-level lambda and ladder systems with incoherent population pumping

1997-01-06

arxiv.org/abs/physics/9701002v1

Phys. Rev. A 55, 2459 (1997)

Physics

Atomic Physics

4 pages, RevTex, 5 figures, to appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.55.2459

The steady state in three-level lambda and ladder systems is studied. It is well-known that in a lambda system this steady state is the coherent population trapping state, independent of the presence of spontaneous emission. In contrast, the steady state in a ladder system is in general not stable against radiative decay and exhibits a minimum in the population of the ground state. It is shown that incoherent population pumping destroys the stability of the coherent population trapping state in the lambda system and suppresses a previously discovered sharp dip in the steady state response. In the ladder system the observed minimum disappears in the presence of an incoherent pump on the upper transition.

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