Quadrature noise in light propagating through a cold 87Rb atomic gas
  We report on the study of the noise properties of laser light propagating through a cold 87Rb atomic sample held in a magneto-optical trap. The laser is tuned around the Fg = 2 \rightarrow Fe = 1, 2 D1 transitions of 87Rb. We observe quadrature-dependent noise in the light signal, an indication that it may be possible to produce squeezed states of light. We measure the minimum and maximum phase-dependent noise as a function of detuning and compare these results to theoretical predictions to explore the best conditions for light squeezing using cold atomic Rb. 
Travis Horrom, Arturo Lezama, Salim Balik, Mark D. Havey, Eugeniy E.   Mikhailov
quant-ph physics.atom-ph