Optical quantum memory for polarization qubits with V-type three-level atoms

Abstract

We investigate an optical quantum memory scheme with V-type three-level atoms based on the controlled reversible inhomogeneous broadening (CRIB) technique. We theoretically show the possibility to store and retrieve a weak light pulse interacting with the two optical transitions of the system. This scheme implements a quantum memory for a polarization qubit - a single photon in an arbitrary polarization state - without the need of two spatially separated two-level media, thus offering the advantage of experimental compactness overcoming the limitations due to mismatching and unequal efficiencies that can arise in spatially separated memories. The effects of a relative phase change between the atomic levels, as well as of phase noise due to, for example, the presence of spurious electric and magnetic fields are analyzed.

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• Quantum storage of polarization qubits in birefringent and anisotropically absorbing materials
• Quantum entanglement and position-momentum entropic squeezing of a moving Lambda-type three-level atom interacting with a single-mode quantized field with intensity-dependent coupling
• Two-color quantum memory in double Λ-media
• Adiabatic passage in photon-echo quantum memories
• Quantum state storage and processing for polarization qubits in an inhomogeneously broadened Λ-type three-level medium
• Storing vector-vortex states of light in intra-atomic frequency comb