Heralded quantum memory for single-photon polarization qubits

Abstract

We propose a scheme to implement a heralded quantum memory for single-photon polarization qubits with a single atom trapped in an optical cavity. In this scheme, an injected photon only exchanges quantum state with the atom, so that the heralded storage can be achieved by detecting the output photon. We also demonstrate that the scheme can be used for realizing the heralded quantum state transfer, exchange and entanglement distribution between distant nodes. The ability to detect whether the operation has succeeded or not is crucial for practical application.

5 pages, 6 figures

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• Cavity-based quantum networks with single atoms and optical photons
• A Quantum Network Node with Crossed Optical Fibre Cavities
• Extraction of a single photon from an optical pulse
• Analysis of Multipartite Entanglement Distribution using a Central Quantum-Network Node
• Efficient ion-photon qubit SWAP gate in realistic ion cavity-QED systems without strong coupling
• Single-photon, cavity-mediated gates: detuning, losses, and non-adiabatic effects
• Generation of optical Fock and W states with single-atom-based bright quantum scissors
• Asymmetric node placement in fiber-based quantum networks
• Heralded Quantum Entanglement between Distant Matter Qubits
• Demonstration of a passive photon-atom swap gate
• Quantum state transfer between a frequency-encoded photonic qubit and a quantum dot spin in a nanophotonic waveguide