Heralded entanglement between error-protected logical qubits for fault-tolerant distributed quantum computing

Li, Jialun; Xie, Zhihao; Li, Yachen; Liang, Yansen; Li, Zhenhua; Li, Tao

doi:10.1007/s11433-023-2245-9

Sci. China Phys. Mech. Astron.

2024

DOI: 10.1007/s11433-023-2245-9

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Heralded entanglement between error-protected logical qubits for fault-tolerant distributed quantum computing

Jialun Li,

Zhihao Xie,

Yachen Li

et al.

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2024

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Cited by 8 publications

(1 citation statement)

References 80 publications

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“…Recently, Li et al [5] proposed a feasible heralded protocol to directly entangle two spatially separated logical qubits with the transmission of a single photon carrying a time-bin encoded qudit. Here, for the first time, Li and his coworker demonstrated the powerful ability of quantum multiplexing for fault-tolerant quantum information processing.…”

mentioning

confidence: 99%

A step toward fault-tolerant distributed quantum computing: Entangling nonlocal logical-qubit with optical quantum multiplexing

Sheng,

Zhou

2023

Sci. China Phys. Mech. Astron.

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mentioning

confidence: 99%

A step toward fault-tolerant distributed quantum computing: Entangling nonlocal logical-qubit with optical quantum multiplexing

Sheng,

Zhou

2023

Sci. China Phys. Mech. Astron.

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Flexible Quantum Network Coding by Using Quantum Multiplexing

Yang,

Liu,

et al. 2024

Adv Quantum Tech

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Quantum network coding (QNC) aims at alleviating quantum communication congestion in quantum networks. Although several QNC protocols have been presented, they cannot meet the practical requirements that part of source nodes intend to transmit their quantum states with same or different qubit numbers via the bottleneck network simultaneously. Here, the study presents a flexible QNC protocol by using quantum multiplexing. First, the entangled pairs are generated between adjacent nodes in a heralded way by using quantum multiplexing. Then the quantum memories of the source nodes and the ones of the corresponding target nodes are entangled when the intermediate nodes execute multiple rounds of entanglement swapping operations on their quantum memories. Finally, the quantum states are transmitted from the source nodes to their corresponding target nodes by means of quantum teleportation. Compared with the existing protocols, the protocol allows an arbitrary part of the source nodes to transmit their quantum states with same or different qubit numbers via the bottleneck network simultaneously, thereby exhibiting its flexibility.

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Error‐Heralded and Deterministic Interconversion Between W State and Greenberger–Horne–Zeilinger State with Faithful Quantum Gates in Decoherence‐Free‐Subspace

Du,

Ma,

Tan

2024

Adv Quantum Tech

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The interconversion of a variety of entangled states can facilitate the information transmission and decline the risk of error rates. Here two faithful protocols to achieve deterministic interconversion between three‐logic‐qubit W state and three‐logic‐qubit Greenberger–Horne–Zeilinger state in decoherence‐free subspace (DFS), resorting to the state‐selective property of the quantum dot (QD)‐cavity systems and robust‐fidelity quantum control gates are presented. Moreover, the single‐photon detectors introduced can effectively herald and mitigate potential failures from imperfect interaction between the QD‐cavity system and photons, significantly enhancing experimental feasibility. Through comprehensive analysis and evaluation, the protocols demonstrate exceptional conversion efficiencies and deliver near‐perfect fidelities. Additionally, the DFS makes system coherence over extended periods to overcome the decoherence effect caused by specific environmental noise, paving the way for quantum information processing.

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Heralded entanglement between error-protected logical qubits for fault-tolerant distributed quantum computing

Cited by 8 publications

References 80 publications

A step toward fault-tolerant distributed quantum computing: Entangling nonlocal logical-qubit with optical quantum multiplexing

A step toward fault-tolerant distributed quantum computing: Entangling nonlocal logical-qubit with optical quantum multiplexing

Flexible Quantum Network Coding by Using Quantum Multiplexing

Error‐Heralded and Deterministic Interconversion Between W State and Greenberger–Horne–Zeilinger State with Faithful Quantum Gates in Decoherence‐Free‐Subspace

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