  We report an experiment on mapping a quantum state of light onto the ground
state spin of an ensemble of Cs atoms with the life time of 2 milliseconds.
Quantum memory for one of the two quadrature phase operators of light is
demonstrated with vacuum and squeezed states of light. The sensitivity of the
mapping procedure at the level of approximately one photon/sec per Hz is shown.
The results pave the road towards complete (storing both quadrature phase
observables) quantum memory for Gaussian states of light. The experiment also
sheds new light on fundamental limits of sensitivity of the magneto-optical
resonance method.
