Optimizing Link-Level Entanglement Generation in Quantum Networks with Unequal Link Lengths

Poramet Pathumsoot, Naphan Benchasattabuse, Ryosuke Satoh, Michal Hajdusek, Rodney Van Meter, Sujin Suwanna

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Quantum internet offers a variety of applications that either enhance or surpass its classical counterpart. Quantum repeaters are imperative to a quantum network as they connect between two quantum nodes, and create quantum entanglement between two targeted nodes with entanglement swapping protocol which require resource from both connections. As a quantum state has a finite decoherent time, it is crucial that a connection protocol is performed efficiently and within suitable time interval, so that two end-To-end matter qubits are entangled. We simulate a second generation network of quantum repeaters, one that is capable of quantum error correction, to estimate the waiting time needed to establish connection between distant nodes. Simulations are performed for a linear chain of nodes with unequal path lengths, and loss rates. We find that asymmetry of path lengths contributes to the waiting time of physical qubits. By simply adjusting the photon generation rate from one of its nodes, the waiting time is reduced while the time to complete quantum state tomography remains unaffected. This simple adjustment can play important roles in compensating for distance asymmetry when a quantum repeater is not stationary.

Original languageEnglish
Title of host publicationICSEC 2021 - 25th International Computer Science and Engineering Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages179-184
Number of pages6
ISBN (Electronic)9781665411974
DOIs
Publication statusPublished - 2021
Event25th International Computer Science and Engineering Conference, ICSEC 2021 - Virtual, Online, Thailand
Duration: 2021 Nov 182021 Nov 20

Publication series

NameICSEC 2021 - 25th International Computer Science and Engineering Conference

Conference

Conference25th International Computer Science and Engineering Conference, ICSEC 2021
Country/TerritoryThailand
CityVirtual, Online
Period21/11/1821/11/20

Keywords

  • Bell states analyzers
  • quantum entanglement swapping
  • quantum network
  • quantum repeaters

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Networks and Communications
  • Computer Science Applications
  • Automotive Engineering
  • Civil and Structural Engineering
  • Control and Optimization

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