We report on the generation of pulses of a low-frequency squeezed vacuum with noise suppression >2 dB below the standard quantum limit in a hot resonant 87 Rb vapor with polarization self-rotation. We demonstrate the possibility to precisely control the temporal profile of the squeezed noise quadrature by applying a calibrated longitudinal magnetic field, without degrading the maximum amount of squeezing.
@article{arxiv.1201.4372,
title = {All-atomic source of squeezed vacuum with full pulse-shape control},
author = {Travis Horrom and Irina Novikova and Eugeniy E. Mikhailov},
journal= {arXiv preprint arXiv:1201.4372},
year = {2012}
}