The group velocity of a laser pulse in this region exceeds c and can even. Pdf gainassisted superluminal light propagation researchgate. Comment on gainassisted superluminal light propagation harry i. In fact the superluminal propagation is only inferred from the existence of a minimum of transmission of the system at the. General electric research center, schenectady, ny 12301. For generations, physicists believed there is nothing faster than light moving through a vacuum a speed of 186,000 miles per second.
In this paper, we report a gainassisted superluminal light propagation in a landauquantized graphene and show that the slope of dispersion. Gainassisted superluminal light propagation through. Gainassisted superluminal light propagation through a bose. Abstract superluminal propagation of light is a wellestablished phenomenon and has motivated immense research interest that has led to stateoftheart knowledge and potential applications in the emerging technology of quantum optics and photonics. Here we use gainassisted linear anomalous dispersion to demon strate superluminal light propagation in atomic caesium gas. Here we use gainassisted linear anomalous dispersion to demonstrate superluminal light propagation in atomic caesium gas. This study presents a theoretical analysis of the gainassisted superluminal light propagation in a fourlevel ntype atomic system by exploiting. Pdf comment on gainassisted superluminal light propagation. Absorptionfree superluminal light propagation in a. Wang et al have also observed the gainassisted superluminal light propagation in an atomic threelevel cesium cs vapor cell via the coherent pumping fields 9. Then, the gainassisted superluminal light propagation due to the crosskerr nonlinearity is established in cavity optomechanical system with a. We have investigated the dispersion and the absorption properties of a weak probe field in a fourlevel atomic system by using incoherent pumping fields. Comment on gainassisted superluminal light propagation arxiv. Ringermacher general electric research center, schenectady, ny 12301 lawrence r.
Landauquantized graphene and show that the slope of dispersion. Scientists have apparently broken the universes speed limit. Absorptionfree superluminal light propagation in a landau. Gainassisted superluminal light propagation nature. We use gainassisted linear anomalous dispersion to demonstrate superluminal light pulse propagation with a negative group velocity through a transparent atomic medium. Pdf wang, kuzmich and dogariu, in their 20 july, 2000, nature article, describe an experiment ostensibly measuring superluminal speeds of. It has been drawn to our attention that we inadvertently did not cite a previous paper by segard and macke1 on. In this paper, we report a gainassisted superluminal light propagation in a. The propagation of a probe laser field in a cavity optomechanical system with a boseeinstein condensate is studied.