Multiplexed spin-wave-photon entanglement source using temporal-multimode memories and feedforward-controlled readout

Abstract

The sources, which generate atom-photon quantum correlations or entanglement based on quantum memory, are basic blocks for building quantum repeaters (QRs). For achieving highly entanglement-generation rates in ensemble-based QRs, spatial-, temporal- and spectral-multimode memories are needed. The previous temporal-multimode memories are based on rephrasing mechanisms in inhomogeneous-broadened media. Here, by applying a train of multi-direction write pulses into a homogeneous-broadened atomic ensemble to induce Duan-Lukin-Cirac-Zoller-like Raman processes, we prepare up to 19 pairs of modes, namely, a spin-wave mode and a photonic time bin. Spin-wave-photon (i.e., atom-photon) entanglement is probabilistically produced in the mode pairs. As a proof-in-principle demonstration, we show that the multiplexed source using all the spin-wave modes and feed-forward-control readout increases spin-wave-photon entanglement generation rate by a factor of $\sim$18.3, compared to non-multiplexed source using the individual modes. The measured Bell parameter for the multiplexed source is $2.30\pm 0.02$ combined with a memory lifetime of $30\mu s$.

References in corpus (47)

• The Quantum Internet
• Long-distance quantum communication with atomic ensembles and linear optics
• Multi-photon entanglement and interferometry
• Generation of Nonclassical Photon Pairs for Scalable Quantum Communication with Atomic Ensembles
• Multimode quantum memory based on atomic frequency combs
• Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
• Broadband waveguide quantum memory for entangled photons
• Quantum Storage of Photonic Entanglement in a Crystal
• Towards a global quantum network
• Spectral multiplexing for scalable quantum photonics using an atomic frequency comb quantum memory and feed-forward control
• High efficiency coherent optical memory with warm rubidium vapour
• Multiplexed Memory-Insensitive Quantum Repeaters
• A millisecond quantum memory for scalable quantum networks
• Quantum storage of entangled telecom-wavelength photons in an erbium-doped optical fibre
• Efficient and long-lived quantum memory with cold atoms inside a ring cavity
• Long-Distance Entanglement Distribution with Single-Photon Sources
• Robust creation of entanglement between remote memory qubits
• An efficient quantum light-matter interface with sub-second lifetime
• Entanglement of a photon and a collective atomic excitation
• Experimental realization of a multiplexed quantum memory with 225 individually accessible memory cells
• A Deterministic and Storable Single-Photon Source Based on Quantum Memory
• Interfacing Collective Atomic Excitations and Single Photons
• Coherent spin control at the quantum level in an ensemble-based optical memory
• Robust and Efficient Quantum Repeaters with Atomic Ensembles and Linear Optics
• A fast and robust approach to long-distance quantum communication with atomic ensembles
• Deterministic single photons via conditional quantum evolution
• A Robust Atom-Photon Entanglement Source for Quantum Repeaters
• Fault-tolerant quantum repeater with atomic ensembles and linear optics
• Towards highly multimode optical quantum memory for quantum repeaters
• Multi-mode and long-lived quantum correlations between photons and spins in a crystal
• A Waveguide Frequency Converter Connecting Rubidium Based Quantum Memories to the Telecom C-Band
• Photon echoes generated by reversing magnetic field gradients in a rubidium vapour
• Entanglement of light-shift compensated atomic spin waves with telecom light
• Long lifetime and high-fidelity quantum memory of photonic polarization qubit by lifting Zeeman degeneracy
• Direct measurement of decoherence for entanglement between a photon and stored atomic excitation
• Solid state source of non-classical photon pairs with embedded multimode quantum memory
• Coherent Storage of Temporally Multimode Light Using a Spin-Wave Atomic Frequency Comb Memory
• Quantum correlations between single telecom photons and a multimode on-demand solid state quantum memory
• Synchronized Independent Narrow-band Single Photons and Efficient Generation of Photonic Entanglement
• Practical Quantum Repeaters with Parametric Down-Conversion Sources
• Multiplexed on-demand storage of polarization qubits in a crystal
• Highly Retrievable Spinwave-Photon Entanglement Source
• Spatial multiplexing of atom-photon entanglement sources using feed-forward controls and switching networks
• Controlled rephasing of single collective spin excitations in a cold atomic quantum memory
• Entanglement between a photonic time-bin qubit and a collective atomic spin excitation
• Temporally multiplexed quantum repeaters with atomic gases
• Quantum repeaters based on heralded qubit amplifiers

Cited by in corpus (9)

• A cold atom temporally multiplexed quantum memory with cavity-enhanced noise suppression
• Multicell Atomic Quantum Memory as a Hardware-Efficient Quantum Repeater Node
• Massively-multiplexed generation of Bell-type entanglement using a quantum memory
• High dimensional entanglement between a photon and a multiplexed atomic quantum memory
• Entanglement distribution with wavevector-multiplexed quantum memory
• Noise suppression in a temporal-multimode quantum memory entangled with a photon via asymmetrical photon-collection channel
• Fast imaging of multimode transverse-spectral correlations for twin photons
• Generation of entanglement between a highly wave-packet-tunable photon and a spin-wave memory in cold atoms
• Robust entanglement buffers based on SWAP interactions