Quantum Storage of Orbital Angular Momentum Entanglement in an Atomic Ensemble

Abstract

Constructing a quantum memory for a photonic entanglement is vital for realizing quantum communication and network. Besides enabling the realization of high channel capacity communication, entangled photons of high-dimensional space are of great interest because of many extended applications in quantum information and fundamental physics fields. Photons entangled in a two-dimensional space had been stored in different system, but there have been no any report on the storage of a photon pair entangled in a high-dimensional space. Here, we report the first experimental realization of storing an entangled orbital angular momentum (OAM) state through a far off-resonant two-photon transition (FORTPT) in a cold atomic ensemble. We reconstruct the matrix density of an OAM entangled state postselected in a two-dimensional subspace with a fidelity of 90.3%+/-0.8% and obtain the Clauser, Horne and Shimony and Holt inequality parameter S of 2.41+/-0.06 after a programmed storage time. All results clearly show the preservation of entanglement during the storage. Besides, we also realize the storage of a true-single-photon via FORTPT for the first time.

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References in corpus (16)

• The Quantum Internet
• Experimental demonstration of quantum memory for light
• Mapping photonic entanglement into and out of a quantum memory
• Quantum Storage of Photonic Entanglement in a Crystal
• Quantum memory for squeezed light
• A millisecond quantum memory for scalable quantum networks
• Photon storage in Lambda-type optically dense atomic media. II. Free-space model
• Mapping broadband single-photon wavepackets into an atomic memory
• Storing images in warm atomic vapor
• Analysis of a quantum memory for photons based on controlled reversible inhomogeneous broadening
• Collapses and revivals of stored orbital angular momentum of light in a cold atomic ensemble
• Holographic quantum computing
• Entanglement of orbital angular momentum states between an ensemble of cold atoms and a photon
• Measuring Qutrit-Qutrit Entanglement of Orbital Angular Momentum States of an Atomic Ensemble and a Photon
• Temporally multiplexed storage of images in a Gradient Echo Memory
• Light storage based on four-wave mixing and electromagnetically induced transparency in cold atoms

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