We use weak-value amplification to enhance the polarization-sensitive fast-light effect from induced Raman absorption in hot rubidium vapor. We experimentally demonstrate that projecting the output signal into an appropriate polarization state enables a pulse advancement of 4.2μs, which is more than 15 times larger than that naturally caused by dispersion. More significantly, we show that combining weak-value amplification with the dispersive response of an atomic system provides a clear advantage in terms of the maximum pulse advance achievable for a given value of loss. This technique has potential applications for designing novel quantum-information-processing gates and optical buffers for telecommunication systems.
Publication Source (Journal or Book title)
Physical Review A
Mirhosseini, M., Viza, G., Magaña-Loaiza, O., Malik, M., Howell, J., & Boyd, R. (2016). Weak-value amplification of the fast-light effect in rubidium vapor. Physical Review A, 93 (5) https://doi.org/10.1103/PhysRevA.93.053836