A metropolitan-scale trapped-ion quantum network node with hybrid multiplexing enhancements
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908273129553920 |
|---|---|
| author | Cui, Z. -B. Wang, Z. -Q. Lai, P. -C. Wang, Y. Shi, J. -X. Liu, P. -Y. Sun, Y. -D. Tian, Z. -C. Liang, Y. -B. Qi, B. -X. Huang, Y. -Y. Zhou, Z. -C. Wu, Y. -K. Xu, Y. Duan, L. -M. Pu, Y. -F. |
| author_facet | Cui, Z. -B. Wang, Z. -Q. Lai, P. -C. Wang, Y. Shi, J. -X. Liu, P. -Y. Sun, Y. -D. Tian, Z. -C. Liang, Y. -B. Qi, B. -X. Huang, Y. -Y. Zhou, Z. -C. Wu, Y. -K. Xu, Y. Duan, L. -M. Pu, Y. -F. |
| contents | Quantum network and quantum repeater are promising ways to scale up a quantum information system to enable various applications with unprecedented performance. As a current bottleneck of building a long-distance quantum network, the distribution rate of heralded entanglement between remote network nodes is typically much lower than the decoherence rate of each local node, which obstructs the implementation of a metropolitan-scale quantum network with more than two remote nodes. A promising scheme to accelerate the remote entanglement distribution is through multiplexing enhancement based on a multimode quantum network node. In this work, we experimentally realize a functional $5$-ion quantum network node with two different types of qubits inside. We employ a hybrid multiplexing scheme combining the methods of multiple excitation and ion shuttling, in which maximally $44$ time-bin modes are generated and sent through a long fiber to boost the entangling rate. Via this scheme, we can generate heralded ion-photon entanglement with a high fidelity of $96.8\%$/$94.6\%$/$89.8\%$ with a success rate of $263\,\text{s}^{-1}$/$40\,\text{s}^{-1}$/$4.28\,\text{s}^{-1}$, over a fiber of $3\,$m/$1\,$km/$12\,$km, respectively. In addition, the memory qubit can protect the stored quantum information from the destructive ion-photon entangling attempts via dual-type encoding and a memory coherence time of $366\,$ms is achieved. This coherence time has exceeded the expected entanglement generation time $234\,$ms over a $12\,$km fiber, which is realized for the first time in a metropolitan-scale quantum network node. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_13898 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A metropolitan-scale trapped-ion quantum network node with hybrid multiplexing enhancements Cui, Z. -B. Wang, Z. -Q. Lai, P. -C. Wang, Y. Shi, J. -X. Liu, P. -Y. Sun, Y. -D. Tian, Z. -C. Liang, Y. -B. Qi, B. -X. Huang, Y. -Y. Zhou, Z. -C. Wu, Y. -K. Xu, Y. Duan, L. -M. Pu, Y. -F. Quantum Physics Quantum network and quantum repeater are promising ways to scale up a quantum information system to enable various applications with unprecedented performance. As a current bottleneck of building a long-distance quantum network, the distribution rate of heralded entanglement between remote network nodes is typically much lower than the decoherence rate of each local node, which obstructs the implementation of a metropolitan-scale quantum network with more than two remote nodes. A promising scheme to accelerate the remote entanglement distribution is through multiplexing enhancement based on a multimode quantum network node. In this work, we experimentally realize a functional $5$-ion quantum network node with two different types of qubits inside. We employ a hybrid multiplexing scheme combining the methods of multiple excitation and ion shuttling, in which maximally $44$ time-bin modes are generated and sent through a long fiber to boost the entangling rate. Via this scheme, we can generate heralded ion-photon entanglement with a high fidelity of $96.8\%$/$94.6\%$/$89.8\%$ with a success rate of $263\,\text{s}^{-1}$/$40\,\text{s}^{-1}$/$4.28\,\text{s}^{-1}$, over a fiber of $3\,$m/$1\,$km/$12\,$km, respectively. In addition, the memory qubit can protect the stored quantum information from the destructive ion-photon entangling attempts via dual-type encoding and a memory coherence time of $366\,$ms is achieved. This coherence time has exceeded the expected entanglement generation time $234\,$ms over a $12\,$km fiber, which is realized for the first time in a metropolitan-scale quantum network node. |
| title | A metropolitan-scale trapped-ion quantum network node with hybrid multiplexing enhancements |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2503.13898 |