35 citations · 36 across the 3 of their papers we have counts for
3 papers
cond-mat.mtrl-sci2004★ 1 cited
How to realize a negative refractive index material at the atomic level in an optical frequency range
Jian Qi Shen, Zhi Chao Ruan, Sailing He
The theoretical mechanism for realizing the negative refractive index with {\it electromagnetically induced transparency} (EIT) is studied. It is shown that in a three-level dense…
quant-ph2004
Explicit formula for the external driving field used to eliminate the decoherence of a two-state system coupled to a noise field
Jian-Qi Shen, Zhi-Chao Ruan, Sailing He
The elimination of decoherence of a multiphoton two-state quantum system by using an appropriate external driving field is considered. The multiphoton process caused by the noise f…
quant-ph2004★ 35 cited
Influence of the signal light on the transient optical properties of a four-level EIT medium
Jian-Qi Shen, Zhi-Chao Ruan, Sailing He
General formulae for the transient evolution of the susceptibility (absorption) induced by the quantum interference effect in a four-level N-type EIT medium is presented. The influ…