1999/05/28 by S N Sandhya, S. N. Sandhya, Sandhya, S N
Computer Science · Physics and Astronomy · #FOS: Physical sciences #Quantum Information and Cryptography #Quantum Physics (quant-ph) #Quantum optics and atomic interactions #Spectroscopy and Quantum Chemical Studies #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/9905098
15 pages, RevTex including postscript figures. Corrected typos
openalex publication_date 1999/05/28 · arxiv created 1999/06/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study resonance flourescence in a four level ladder system and illustrate some novel features due to quantum interference and atomic coherence effects. We find that under three photon resonant conditions, in some region of the parameter space of the rabi frequencies Ω1,Ω2,Ω3, emission is dominantly by the level 4 at the line center even though there is an almost equal distribution of populations in all the levels. As one increases Ω3 with Ω1 and Ω2 held fixed, the four level system 'dynamically collapses' to a two level system. The steady state populations and the the resonance flourescence from all the levels provide adequate evidence to this effect.