Certification of non-classicality in all links of a photonic star network without assuming quantum mechanics

Wang, Ningning; Pozas-Kerstjens, Alejandro; Zhang, Chao; Liu, Bi-Heng; Huang, Yun‐Feng; Li, Chuan‐Feng; Guo, Guang-Can; Gisin, Nicolas; Tavakoli, Armin

doi:10.1038/s41467-023-37842-w

Cited by 8 publications

(1 citation statement)

References 55 publications

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“…FNN is also observed in experiments for several networks. [18][19][20][21] Sequentially, in Ref. [22], Luo et al generalized the notion of FNN to hierarchical NN, which is called l-level network nonlocality (l-NN).…”

Section: Introductionmentioning

confidence: 99%

Verifying hierarchical network nonlocality in general quantum networks

Yang 杨,

Hou 侯,

He 贺

2024

Chinese Phys. B

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Recent, the notions of fully and l-level quantum network nonlocality (FQNN and l-QNN) have been proposed to investigate quantum network nonlocality who cannot be generated when at least l sources in a quantum network distribute classical physical systems. Such notions are regarded to be beyond the standard quantum network nonlocality (QNN), which can only guarantee that there is one non-classical source in this quantum network. Up to now, the topic of FQNN and l-QNN has been established for star and chain networks in [A. Pozas-Kerstjens et al. Phys. Rev. Lett. 128, 010403 (2022)] and [M. X. Luo et al. Arxiv. 2306.15717 quant-ph Jan. 2024]. In the paper, we focus on the case of more complex-structure general networks. We first establish the Bell-type inequalities for verifying l-QNN in acyclic and cyclic networks respectively. Furthermore, some cases of general networks are also discussed. For instance, the well-known Butterfly networks.

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Section: Introductionmentioning

confidence: 99%

Verifying hierarchical network nonlocality in general quantum networks

Yang 杨,

Hou 侯,

He 贺

2024

Chinese Phys. B

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Certification of non-classicality in all links of a photonic star network without assuming quantum mechanics

et al. 2023

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Networks composed of independent sources of entangled particles that connect distant users are a rapidly developing quantum technology and an increasingly promising test-bed for fundamental physics. Here we address the certification of their post-classical properties through demonstrations of full network nonlocality. Full network nonlocality goes beyond standard nonlocality in networks by falsifying any model in which at least one source is classical, even if all the other sources are limited only by the no-signaling principle. We report on the observation of full network nonlocality in a star-shaped network featuring three independent sources of photonic qubits and joint three-qubit entanglement-swapping measurements. Our results demonstrate that experimental observation of full network nonlocality beyond the bilocal scenario is possible with current technology.

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Continuous variable quantum teleportation network with star topology

Wu,

Tian,

Yao

et al. 2024

Applied Physics Letters

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Quantum network allows communication among more than two users with quantum teleportation and high quantum fidelity enabled by non-classical resources. As one of the most versatile architectures, all users are connected mediated by the central station in the star topology network, leading to the realization of the information interconnection and interoperability. In this work, we experimentally demonstrate a 4-branch continuous variable (CV) quantum teleportation network with star topology by employing entangled sideband modes from one squeezed state of light. Here, multiple pairs of entangled sideband modes are distributed on demand to central station and four nodes, respectively. Each node linked to the network has its own communication channel with the central station, where the deterministic CV quantum teleportation protocol is implemented with the fidelities above 0.830.

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Certification of non-classicality in all links of a photonic star network without assuming quantum mechanics

Cited by 8 publications

References 55 publications

Verifying hierarchical network nonlocality in general quantum networks

Verifying hierarchical network nonlocality in general quantum networks

Certification of non-classicality in all links of a photonic star network without assuming quantum mechanics

Continuous variable quantum teleportation network with star topology

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