Open AccessThe conversion between subluminal and superluminal lightpropagation phenomena in an inverted Y-typefour-level quantum system
Author(s) -
Dong Meng,
Xiaodong Liu,
Senlin Zhang
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.020305
Subject(s) - superluminal motion , physics , electromagnetically induced transparency , group velocity , rabi frequency , field (mathematics) , quantum beats , optics , quantum optics , quantum , quantum mechanics , laser , mathematics , pure mathematics
We have studied the light propagation properties in an inverted Y-type four-level quantum system coupled with probe, couple and driving fields. Using the numerical simulation method, we investigate the absorption properties of the probe light field when the Rabi frequency and detuning of the driving field are changed. From the three-dimensional graphics, we find the variations of the probe group velocity at the electromagnetically induced transparency windows. Farthermore, we theoretically obtain the conversion among subluminal, vacuum and superluminal light propagation by adjusting the Rabi frequency and detuning of the external driving field properly.