3 papers
physics.optics2008
Is it possible for a superluminal signal velocity without violating causality?
Li-Gang Wang
We present a model for a vacuum-like effective medium composed of the absorbing and gain media under the special designed parameters. Within the linear response theory, we prove th…
physics.optics2008
Fidelity, purity and entanglement of two-mode spatially Gaussian-entangled light fields in Turbulence Atmosphere
Li-Gang Wang, Shi-Yao Zhu
In this paper, we investigate the propagation of two-mode spatially Gaussian-entangled quantum light fields passing through the turbulence atmosphere. From the propagation formula…
physics.optics2008
The equivalent medium theory within the linear response region
Li-Gang Wang
In this paper, we present the equivalent medium theory by using the linear response theory. It is found that, under the condition of the linear response, a series of different medi…