Two-color quantum memory in double Λ-media

Abstract

We propose a quantum memory for a single-photon wave packet in a superposition of two different colors, i.e., two different frequency components, using the electromagnetically induced transparency technique in a double-Λ system. We examine a specific configuration in which the two frequency components are able to exchange energy through a four-wave mixing process as they propagate, so the state of the incident photon is recovered periodically at certain positions in the medium. We investigate the propagation dynamics as a function of the relative phase between the coupling beams and the input single-photon frequency components. Moreover, by considering time-dependent coupling beams, we numerically simulate the storage and retrieval of a two-frequency-component single-photon qubit.

9 pages, 5 figures

References in corpus (12)

• The Quantum Internet
• Mapping photonic entanglement into and out of a quantum memory
• Quantum Storage of Photonic Entanglement in a Crystal
• Quantum Memories. A Review based on the European Integrated Project "Qubit Applications (QAP)"
• A Single-Atom Quantum Memory
• Memory-built-in quantum teleportation with photonic and atomic qubits
• Long-Distance Entanglement Distribution with Single-Photon Sources
• Robust and Efficient Quantum Repeaters with Atomic Ensembles and Linear Optics
• Stationary Light Pulses without Bragg Gratings
• Stationary Light Pulses in Cold Atomic Media
• Quantum storage of polarization qubits in birefringent and anisotropically absorbing materials
• Dark-State Polaritons in Single- and Double-$\Lambda$ Media