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An Implementation and Analysis of a Practical Quantum Link Architecture Utilizing Entangled Photon Sources

Kento Samuel Soon, Michal Hajdušek, Shota Nagayama, Naphan Benchasattabuse, Kentaro Teramoto, Ryosuke Satoh, Rodney Van Meter

Abstract

Quantum repeater networks play a crucial role in distributing entanglement. Various link architectures have been proposed to facilitate the creation of Bell pairs between distant nodes, with entangled photon sources emerging as a primary technology for building quantum networks. Our work advances the Memory-Source-Memory (MSM) link architecture, addressing the absence of practical implementation details. We conduct numerical simulations using the Quantum Internet Simulation Package (QuISP) to analyze the performance of the MSM link and contrast it with other link architectures. We observe a saturation effect in the MSM link, where additional quantum resources do not affect the Bell pair generation rate of the link. By introducing a theoretical model, we explain the origin of this effect and characterize the parameter region where it occurs. Our work bridges theoretical insights with practical implementation, which is crucial for robust and scalable quantum networks.

An Implementation and Analysis of a Practical Quantum Link Architecture Utilizing Entangled Photon Sources

Abstract

Quantum repeater networks play a crucial role in distributing entanglement. Various link architectures have been proposed to facilitate the creation of Bell pairs between distant nodes, with entangled photon sources emerging as a primary technology for building quantum networks. Our work advances the Memory-Source-Memory (MSM) link architecture, addressing the absence of practical implementation details. We conduct numerical simulations using the Quantum Internet Simulation Package (QuISP) to analyze the performance of the MSM link and contrast it with other link architectures. We observe a saturation effect in the MSM link, where additional quantum resources do not affect the Bell pair generation rate of the link. By introducing a theoretical model, we explain the origin of this effect and characterize the parameter region where it occurs. Our work bridges theoretical insights with practical implementation, which is crucial for robust and scalable quantum networks.
Paper Structure (10 sections, 3 equations, 8 figures, 1 table)

This paper contains 10 sections, 3 equations, 8 figures, 1 table.

Table of Contents

  1. Introduction
  2. Preliminaries
  3. Quantum repeaters
  4. Quantum link architectures
  5. MIM link
  6. MM link
  7. MSM link
  8. MSM protocol
  9. Results
  10. Conclusion

Figures (8)

  • Figure 1: MIM link architecture with an external BSA positioned between the two QNodes. After emission of a photon, quantum memories in both QNodes are locked until reception of the return classical message sent by the BSA.
  • Figure 2: MM link architecture with an internal BSA at one of the QNodes. This QNode can make immediate decisions whether to reset a memory or keep it locked.
  • Figure 3: MSM link architecture with an EPPS in the middle. Both QNodes can now make quick decisions about resetting their memories since they are both equipped with internal BSAs.
  • Figure 4: Sequence diagram for the MSM protocol detailing the order and type of messages that sent during the protocol"s execution, as well as the operations applied by the QNodes.
  • Figure 5: Quantum circuit representation of the MSM link operation for a single trial.
  • ...and 3 more figures