Here we use gain-assisted linear anomalous dispersion to demon- strate superluminal light propagation in atomic caesium gas. The. Then, the gain-assisted superluminal light propagation due to the cross-Kerr nonlinearity is established in cavity optomechanical system with a. Comment on: Gain-assisted superluminal light propagation through a Bose- Einstein condensate cavity system. Authors; Authors and affiliations. Bruno Macke.

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## Gain-assisted superluminal light propagation

Metal conductivity also controls SPP propagation. Analogous to photon drag in the superluminal anomalous dispersion region where light polarization rotation occurs opposite the rotation of the gain-assisted atomic medium, the rotation of the atomic-metal interface also rotates the polarization state of SPPs opposite the rotation of the interface.

Series I Physics Physique Fizika. Gain-assisted superluminal propagation and rotary drag of photon and surface plasmon polaritons [Phys.

### Gain-assisted superluminal light propagation

Rabi frequencies of the control and pump fields considerably modify both photon and SPP drag coefficients. Sign up to receive regular email alerts from Physical Review A. Weyl fermions are gain-adsisted in a solid.

This study presents a theoretical analysis of the gain-assisted superluminal light propagation in a four-level N -type atomic system by exploiting the scheme of electromagnetically induced gain and superluminal propagation of surface plasmon polaritons SPPs along the gain-assisted atomic-metal interface simultaneously.

This further confirms the superluminal nature of SPPs propagating along the interface with negative group velocity.

Coherent control Effects of atomic coherence on light propagation Light-matter interaction Nonlinear optics Optical coherence Quantum optics. The quantum emitters support SPP propagation along the interface. In addition, a theoretical demonstration is presented on the comparison between Fresnel’s rotary photon drag and SPP drag in view of light polarization state rotation by rotating the coherent atomic medium and the atomic-metal interface, respectively.

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Abstract Superluminal propagation of light is a well-established phenomenon and has motivated immense research interest that has led to state-of-the-art knowledge and potential applications in the emerging technology of quantum optics propagatioh photonics.

As shown, the electric field E of SPPs decays exponentially with respect to distance z from the interface.

A 96 A 96— Published 24 July ; Erratum Phys. Figure 1 a Schematic of gain-assisted propagation of light in a four-level N -type atomic system under the scheme of electromagnetically induced gain.

Superluminal propagation of light is a superluminl phenomenon and has motivated immense research interest that has led to state-of-the-art knowledge and potential applications in the emerging technology of quantum optics and photonics.