Entanglement distribution in quantum networks via swapping of partially entangled states

• URL: http://arxiv.org/abs/2508.04536v1
• Date: Wed, 06 Aug 2025 15:22:51 GMT
• Title: Entanglement distribution in quantum networks via swapping of partially entangled states
• Authors: Henrique Guerra, Tailan S. Sarubi, Rafael Chaves, Jonas Maziero,
• Abstract summary: The entanglement swapping protocol (ESP) is a primitive for distributing quantum correlations across distant nodes in a quantum network.<n>Recent studies have demonstrated that even when the involved qubit pairs are only partially entangled, it is still possible to concentrate and transmit entanglement via Bell-basis measurements.<n>We extend these ideas to quantum networks with various topologies by analyzing the application of the ESP to initially partially entangled states.
• Score: 0.44998333629984877
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The entanglement swapping protocol (ESP) is a fundamental primitive for distributing quantum correlations across distant nodes in a quantum network. Recent studies have demonstrated that even when the involved qubit pairs are only partially entangled, it is still possible to concentrate and transmit entanglement via Bell-basis measurements. In this work, we extend these ideas to quantum networks with various topologies - including linear, star, and hybrid configurations - by analyzing the application of the ESP to initially partially entangled states. We investigate how entanglement evolves under such protocols by examining the transformations of the initial states and evaluating the success probabilities for generating maximally entangled states at the output. Our results offer new insights into the dynamics of the entanglement distribution in quantum networks and provide practical guidelines for designing robust quantum communication strategies under realistic conditions.

Related papers

• Separable Power of Classical and Quantum Learning Protocols Through the Lens of No-Free-Lunch Theorem [70.42372213666553]
  The No-Free-Lunch (NFL) theorem quantifies problem- and data-independent generalization errors regardless of the optimization process. We categorize a diverse array of quantum learning algorithms into three learning protocols designed for learning quantum dynamics under a specified observable. Our derived NFL theorems demonstrate quadratic reductions in sample complexity across CLC-LPs, ReQu-LPs, and Qu-LPs. We attribute this performance discrepancy to the unique capacity of quantum-related learning protocols to indirectly utilize information concerning the global phases of non-orthogonal quantum states.
  arXiv  Detail & Related papers  (2024-05-12T09:05:13Z)
• Quantum Networks Enhanced by Distributed Quantum Memories [0.0]
  We show that a network-wide synergistic usage of quantum memories distributed in a quantum communication network offers a fundamental advantage. We first map the problem of quantum communication with local usage of memories into a classical continuum percolation model. This improved mapping can be formulated in terms of graph-merging rules, analogous to the decimation rules of the renormalization group treatment of disordered quantum magnets.
  arXiv  Detail & Related papers  (2024-03-25T02:16:25Z)
• Guarantees on the structure of experimental quantum networks [105.13377158844727]
  Quantum networks connect and supply a large number of nodes with multi-party quantum resources for secure communication, networked quantum computing and distributed sensing. As these networks grow in size, certification tools will be required to answer questions regarding their properties. We demonstrate a general method to guarantee that certain correlations cannot be generated in a given quantum network.
  arXiv  Detail & Related papers  (2024-03-04T19:00:00Z)
• Distributed Partial Quantum Consensus of Qubit Networks with Connected Topologies [13.978557505365604]
  Two partial quantum consensus protocols, based on the Lyapunov method for chain graphs and the geometry method for connected graphs, are proposed. The numerical simulation over a qubit network is demonstrated to verify the validity and the effectiveness of the theoretical results.
  arXiv  Detail & Related papers  (2024-02-22T03:44:45Z)
• Statistical properties and repetition rates for a quantum network with geographical distribution of nodes [0.49157446832511503]
  We build upon recent models for quantum networks based on optical fibers by considering the effect of a non-uniform distribution of nodes. We employ it to compute the repetition rates for entanglement swapping, an essential protocol for quantum communication based on quantum repeaters.
  arXiv  Detail & Related papers  (2023-12-14T17:01:21Z)
• Entanglement-Assisted Quantum Networks: Mechanics, Enabling Technologies, Challenges, and Research Directions [66.27337498864556]
  This paper presents a comprehensive survey of entanglement-assisted quantum networks. It provides a detailed overview of the network structure, working principles, and development stages. It also emphasizes open research directions, including architecture design, entanglement-based network issues, and standardization.
  arXiv  Detail & Related papers  (2023-07-24T02:48:22Z)
• Quantum-enhanced metrology with network states [8.515162179098382]
  We prove a general bound that limits the performance of using quantum network states to estimate a global parameter. Our work establishes both the limitation and the possibility of quantum metrology within quantum networks.
  arXiv  Detail & Related papers  (2023-07-15T09:46:35Z)
• Strong entanglement distribution of quantum networks [3.6720510088596297]
  Large-scale quantum networks have been employed to overcome practical constraints of transmissions and storage for single entangled systems. We show any connected network consisting of generalized EPR states and GHZ states satisfies strong CKW monogamy inequality in terms of bipartite entanglement measure. We classify entangled quantum networks by distinguishing network configurations under local unitary operations.
  arXiv  Detail & Related papers  (2021-09-27T08:45:18Z)
• Direct Quantum Communications in the Presence of Realistic Noisy Entanglement [69.25543534545538]
  We propose a novel quantum communication scheme relying on realistic noisy pre-shared entanglement. Our performance analysis shows that the proposed scheme offers competitive QBER, yield, and goodput.
  arXiv  Detail & Related papers  (2020-12-22T13:06:12Z)
• Genuine quantum networks: superposed tasks and addressing [68.8204255655161]
  We show how to make quantum networks, both standard and entanglement-based, genuine quantum. We provide them with the possibility of handling superposed tasks and superposed addressing.
  arXiv  Detail & Related papers  (2020-04-30T18:00:06Z)
• Entanglement Classification via Neural Network Quantum States [58.720142291102135]
  In this paper we combine machine-learning tools and the theory of quantum entanglement to perform entanglement classification for multipartite qubit systems in pure states. We use a parameterisation of quantum systems using artificial neural networks in a restricted Boltzmann machine (RBM) architecture, known as Neural Network Quantum States (NNS)
  arXiv  Detail & Related papers  (2019-12-31T07:40:23Z)

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.