2001/06/19 by G. S. Agarwal, Tarak Nath Dey, S. Menon +1 · 1 citation
Physics and Astronomy · #Photorefractive and Nonlinear Optics #Quantum optics and atomic interactions #Random lasers and scattering media #quant-ph
paper · pdf · doi:10.1103/physreva.64.053809
published as Phys. Rev. A, 64, 053809 (2001) · 6 pages,5 figures, typed in RevTeX, accepted in Phys. Rev. A
arxiv created 2001/06/19 · openalex publication_date 2001/10/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We show how the application of a coupling field connecting the two lower metastable states of a \ensuremathΛ system can produce a variety of effects on the propagation of a weak electromagnetic pulse. In principle the light propagation can be changed from subluminal to superluminal. The negative group index results from regions of anomalous dispersion and gain in susceptibility.