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Phys. Rev. A 70, 011801(R) (2004) [4 pages]

Superluminal and slow light propagation in cold atoms

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Hoonsoo Kang1, Gessler Hernandez1, and Yifu Zhu1,2
1Department of Physics, Florida International University, Miami, Florida 33199, USA
2Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China

Received 8 March 2004; published 7 July 2004

The group velocity of a light pulse propagating through a four-level system exhibiting electromagnetically induced transparency can be manipulated by a pump laser. The pump laser induces the large optical nonlinearities with steep normal or anomalous dispersion. We present experimental measurements that demonstrate both slow and superluminal light propagation in cold Rb atoms.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.70.011801
DOI:
10.1103/PhysRevA.70.011801
PACS:
42.50.Gy, 42.65.−k, 32.80.−t