Experimental demonstration of memory-enhanced scaling for entanglement connection of quantum repeater segments

Abstract

The quantum repeater protocol is a promising approach to implement long-distance quantum communication and large-scale quantum networks. A key idea of the quantum repeater protocol is to use long-lived quantum memories to achieve efficient entanglement connection between different repeater segments with a polynomial scaling. Here we report an experiment which realizes efficient connection of two quantum repeater segments via on-demand entanglement swapping by the use of two atomic quantum memories with storage time of tens of milliseconds. With the memory enhancement, scaling-changing acceleration is demonstrated in the rate for a successful entanglement connection. The experimental realization of entanglement connection of two quantum repeater segments with an efficient memory-enhanced scaling demonstrates a key advantage of the quantum repeater protocol, which makes a cornerstone towards future large-scale quantum networks.

References in corpus (24)

• The Quantum Internet
• Long-distance quantum communication with atomic ensembles and linear optics
• Purification of Noisy Entanglement and Faithful Teleportation via Noisy Channels
• Dark-State Polaritons in Electromagnetically Induced Transparency
• Quantum interface between light and atomic ensembles
• Heralded entanglement between solid-state qubits separated by 3 meters
• Storage and retrieval of single photons transmitted between remote quantum memories
• Experimental demonstration of memory-enhanced quantum communication
• Measurement-Induced Entanglement for Excitation Stored in Remote Atomic Ensembles
• All photonic quantum repeaters
• A solid state light-matter interface at the single photon level
• Experimental demonstration of a BDCZ quantum repeater node
• Functional Quantum Nodes for Entanglement Distribution over Scalable Quantum Networks
• Entanglement of two quantum memories via fibers over dozens of kilometres
• High-rate, high-fidelity entanglement of qubits across an elementary quantum network
• Tunable ion-photon entanglement in an optical cavity
• Experimental Realization of Entanglement Concentration and A Quantum Repeater
• An efficient quantum light-matter interface with sub-second lifetime
• Experimental quantum repeater without quantum memory
• Light-matter entanglement over 50 km of optical fibre
• Quantum-memory-assisted multi-photon generation for efficient quantum information processing
• Atom-atom entanglement by single-photon detection
• Light storage in a magnetically-dressed optical lattice
• Highly Retrievable Spinwave-Photon Entanglement Source

Cited by in corpus (30)

• Quantum repeaters: From quantum networks to the quantum internet
• Towards real-world quantum networks: a review
• SeQUeNCe: A Customizable Discrete-Event Simulator of Quantum Networks
• A telecom-wavelength quantum repeater node based on a trapped-ion processor
• Quantum amplification and simulation of strong and ultrastrong coupling of light and matter
• A Quantum Repeater Node Demonstrating Unconditionally Secure Key Distribution
• Remote distribution of non-classical correlations over 1250 modes between a telecom photon and a ${}^{171}$Yb${}^{3+}$:Y${}_2$SiO${}_5$ crystal
• Towards metropolitan free-space quantum networks
• Quantum NETwork: from theory to practice
• Single-photon synchronization with a room-temperature atomic quantum memory
• Quantum storage of entangled photons at telecom wavelengths in a crystal
• Multicell Atomic Quantum Memory as a Hardware-Efficient Quantum Repeater Node
• Realization of a programmable multi-purpose photonic quantum memory with over-thousand qubit manipulations
• Fast delivery of heralded atom-photon quantum correlation over 12km fiber through multiplexing enhancement
• Rate limits in quantum networks with lossy repeaters
• Generation of highly retrievable atom photon entanglement with a millisecond lifetime via a spatially multiplexed cavity
• Proposal for distribution of multi-photon entanglement with optimal rate-distance scaling
• Realization of a crosstalk-free two-ion node for long-distance quantum networking
• A reconfigurable entanglement distribution network suitable for connecting multiple ground nodes with a satellite
• Quantum-Memory-Enhanced Preparation of Nonlocal Graph States
• Remote Quantum Networks based on Quantum Memories
• Hybrid Quantum Repeaters with Ensemble-based Quantum Memories and Single-spin Photon Transducers
• Quantum repeater node with free-space coupled trapped ions
• Scalable Timing Coordination of Bell State Analyzers in Quantum Networks
• Satellites promise global-scale quantum networks
• Light Storage in Light Cages: A Scalable Platform for Multiplexed Quantum Memories
• Hybrid classical-quantum communication networks
• Scalable and modular generation of multipartite entangled states through memory-enhanced fusion
• Multiplexed ion-ion entanglement over $1.2$ kilometer fibers
• Generation of perfect-cavity-enhanced atom-photon entanglement with a millisecond lifetime via a spatially-multiplexed cavity