Abstract
We produce a 600-ns pulse of 1.86-dB squeezed vacuum at 795 nm in an optical parametric amplifier and store it in a rubidium vapor cell for using electromagnetically induced transparency. The recovered pulse, analyzed using time-domain homodyne tomography, exhibits up to of squeezing. We identify the factors leading to the degradation of squeezing and investigate the phase evolution of the atomic coherence during the storage interval.
- Received 11 October 2007
DOI:https://doi.org/10.1103/PhysRevLett.100.093602
©2008 American Physical Society