Quantum memory for light - art. no. 033809

We propose an efficient method for mapping and storage of a quantum state o f propagating light in atoms. The quantum state of the light pulse is store d in two sublevels of the ground state of a macroscopic atomic ensemble by activating a synchronized Raman coupling between the light and atoms. We di scuss applications of the proposal in quantum information processing and in atomic clocks operating beyond quantum limits of accuracy. The possibility of transferring the atomic state back on light via teleportation is also d iscussed.