Abstract
Teleportation is an important protocol in quantum communication. Realizing teleportation between arbitrary nodes in multi-hop quantum networks is of great value. Most of the existing multi-hop quantum networks are based on Bell states or Greeberger–Horne–Zeilinger (GHZ) states. Bell state is more susceptible to noise than GHZ states after purification, but generating a GHZ state consumes more basic states. In this paper, a new quantum multi-hop network scheme is proposed to improve the interference immunity of the network and avoid large consumption at the same time. Teleportation is realized in a network based on entanglement swapping, fusion, and purification. To ensure the robustness of the system, we also design the purification algorithm. The simulation results show the successful establishment of entanglement with high fidelity. Cirq is used to verify the network on the Noisy Intermediate-Scale Quantum (NISQ) platform. The robustness of the fusion scheme is better than the Bell states scheme, especially with the increasing number of nodes. This paper provides a solution to balance the performance and consumption in a multi-hop quantum network.
Highlights
Teleportation is always used for transferring quantum information with the aid of maximally entangled states and classical channels
Many other teleportation protocols were proposed based on different entangled states, such as GHZ states, W states, and cluster states [3,4,5]
This paper proposes a new scheme of a multi-hop quantum network based on bipartite communication with fusion states
Summary
Teleportation is always used for transferring quantum information with the aid of maximally entangled states and classical channels. Many other teleportation protocols were proposed based on different entangled states, such as GHZ states, W states, and cluster states [3,4,5]. In 2005, Cheng proposed the Bridging protocol of the network in this field [6], and the ideas for teleportation network were given in different entangled states [7,8]. They are all designed based on the teleportation between directly connected nodes. Quantum states in all intermediate nodes are measured in the end to realize teleportation.
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