Multiplexed ion-ion entanglement over $1.2$ kilometer fibers
- URL: http://arxiv.org/abs/2510.20392v1
- Date: Thu, 23 Oct 2025 09:42:31 GMT
- Title: Multiplexed ion-ion entanglement over $1.2$ kilometer fibers
- Authors: Z. B. Cui, Z. Q. Wang, P. Y. Liu, Y. Wang, P. C. Lai, J. X. Shi, Y. D. Sun, Z. C. Tian, H. S. Sun, Y. B. Liang, B. X. Qi, Y. Y. Huang, Z. C. Zhou, Y. K. Wu, Y. Xu, Y. F. Pu, L. M. Duan,
- Abstract summary: We demonstrate the first multiplexing-enhanced heralded entanglement between two trapped-ion quantum network nodes.<n>By multiplexing $10$ temporal photonic modes, we achieve a 4.59-fold speedup in ion-ion entanglement generation.<n>Our system is readily scalable to multiple nodes, thereby establishing a key building block for future large-scale quantum networks.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Quantum networks and quantum repeaters represent the promising avenues for building large-scale quantum information systems, serving as foundational infrastructure for distributed quantum computing, long-distance quantum communication, and networked quantum sensing. A critical step in realizing a functional quantum network is the efficient and high-fidelity establishment of heralded entanglement between remote quantum nodes. Multiplexing offers a powerful strategy to accelerate remote entanglement distribution, particularly over long optical fibers. Here, we demonstrate the first multiplexing-enhanced heralded entanglement between two trapped-ion quantum network nodes. By multiplexing $10$ temporal photonic modes, we achieve a 4.59-fold speedup in ion-ion entanglement generation and attain an entanglement fidelity of $95.9\pm1.5\%$ over $1.2$ km of fiber. Employing a dual-type architecture, our system is readily scalable to multiple nodes, thereby establishing a key building block for future large-scale quantum networks.
Related papers
- A building block of quantum repeaters for scalable quantum networks [31.28992546873135]
We develop and maintain memory-memory entanglement over a 10 km fibre within the average entanglement establishment time.<n>As a direct application, we demonstrate 1,917 secret keys out of 4.05*105 Bell pairs over 10 km.
arXiv Detail & Related papers (2026-02-09T10:19:31Z) - A metropolitan-scale trapped-ion quantum network node with hybrid multiplexing enhancements [0.0]
We experimentally realize a functional $5$-ion quantum network node with two different types of qubits inside.<n>We can generate heralded ion-photon entanglement with a high fidelity of $96.8%$/$94.6%$/$89.8%$ with a success rate of $263,texts-1$/$40,texts-1$/$4.28,texts-1$, over a fiber of $3,$m/$1,$km/$12,$km, respectively.
arXiv Detail & Related papers (2025-03-18T04:51:05Z) - Realization of a crosstalk-free two-ion node for long-distance quantum networking [0.0]
Trapped atomic ions constitute one of the leading physical platforms for building the quantum repeater nodes.<n>In a long-distance trapped-ion quantum network, it is essential to have crosstalk-free dual-type qubits.<n>We report the first experimental implementation of a telecom-compatible and crosstalk-free quantum network node.
arXiv Detail & Related papers (2024-05-22T05:58:37Z) - Metropolitan-scale heralded entanglement of solid-state qubits [0.0]
We report on heralded entanglement between two independently operated quantum network nodes separated by 10km.
We minimize the effects of fiber photon loss by quantum frequency conversion of the qubit-stabilized photons to the telecom L-band.
We demonstrate the delivery of a predefined entangled state on the nodes irrespective of the heralding detection pattern.
arXiv Detail & Related papers (2024-04-04T18:00:01Z) - Multiplexed quantum repeaters with hot multimode alkali-noble gas memories [45.49722819849123]
We propose a non-cryogenic optical quantum memory for noble-gas nuclear spins based on the Atomic Frequency Comb protocol.
We discuss how these quantum memories can enhance rates in satellite quantum communication networks.
arXiv Detail & Related papers (2024-02-27T18:39:15Z) - A Quantum Repeater Platform based on Single SiV$^-$ Centers in Diamond
with Cavity-Assisted, All-Optical Spin Access and Fast Coherent Driving [45.82374977939355]
Quantum key distribution enables secure communication based on the principles of quantum mechanics.
Quantum repeaters are required to establish large-scale quantum networks.
We present an efficient spin-photon interface for quantum repeaters.
arXiv Detail & Related papers (2022-10-28T14:33:24Z) - Field-deployable Quantum Memory for Quantum Networking [62.72060057360206]
We present a quantum memory engineered to meet real-world deployment and scaling challenges.
The memory technology utilizes a warm rubidium vapor as the storage medium, and operates at room temperature.
We demonstrate performance specifications of high-fidelity retrieval (95%) and low operation error $(10-2)$ at a storage time of 160 $mu s$ for single-photon level quantum memory operations.
arXiv Detail & Related papers (2022-05-26T00:33:13Z) - Multiplexed telecom-band quantum networking with atom arrays in optical
cavities [0.3499870393443268]
We propose a platform for quantum processors comprising neutral atom arrays with telecom-band photons in a multiplexed network architecture.
The use of a large atom array instead of a single atom mitigates the deleterious effects of two-way communication and improves the entanglement rate between two nodes by nearly two orders of magnitude.
arXiv Detail & Related papers (2021-07-09T15:05:57Z) - Characterization and stability measurement of deployed multicore fibers
for quantum applications [50.591267188664666]
We characterize for the first time, in terms of phase stability, multiple strands of a 4-core multicore fiber installed underground in the city of L'Aquila.
We investigate the possibility of using such an infrastructure to implement quantum-enhanced schemes, such as high-dimensional quantum key distribution, quantum-based environmental sensors.
arXiv Detail & Related papers (2021-03-11T18:24:59Z) - Path-encoded high-dimensional quantum communication over a 2 km
multicore fiber [50.591267188664666]
We demonstrate the reliable transmission over a 2 km long multicore fiber of path-encoded high-dimensional quantum states.
A stable interferometric detection is guaranteed, allowing for low error rates and the generation of 6.3 Mbit/s of secret key rate.
arXiv Detail & Related papers (2021-03-10T11:02:45Z) - Telecom-heralded entanglement between remote multimode solid-state
quantum memories [55.41644538483948]
Future quantum networks will enable the distribution of entanglement between distant locations and allow applications in quantum communication, quantum sensing and distributed quantum computation.
Here we report the demonstration of heralded entanglement between two spatially separated quantum nodes, where the entanglement is stored in multimode solid-state quantum memories.
We also show that the generated entanglement is robust against loss in the heralding path, and demonstrate temporally multiplexed operation, with 62 temporal modes.
arXiv Detail & Related papers (2021-01-13T14:31:54Z) - Experimental quantum conference key agreement [55.41644538483948]
Quantum networks will provide multi-node entanglement over long distances to enable secure communication on a global scale.
Here we demonstrate quantum conference key agreement, a quantum communication protocol that exploits multi-partite entanglement.
We distribute four-photon Greenberger-Horne-Zeilinger (GHZ) states generated by high-brightness, telecom photon-pair sources across up to 50 km of fibre.
arXiv Detail & Related papers (2020-02-04T19:00:31Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.