中文摘要：

We study the light propagation properties in a V-type three-level atomic system interacting with two independent broadband squeezed baths.Using the graphic method,the dependences of the absorption and the dispersion of the system on the coupling field strength,the incoherent pumping field strength and the intensity of the squeezed vacuum are analysed.The result shows that the probe pulse propagation can be changed from subluminal to superluminal speed.

英文摘要：

We study the light propagation properties in a V-type three-level atomic system interacting with two independent broadband squeezed baths. Using the graphic method, the dependences of the absorption and the dispersion of the system on the coupling field strength, the incoherent pumping field strength and the intensity of the squeezed vacuum are analysed. The result shows that the probe pulse propagation can be changed from subluminal to superluminal speed.