Quantum computing to solve scenario-based stochastic time-dependent shortest path routing

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Vinayak V. Dixit - , University of New South Wales (Author)
  • Chence Niu - , University of New South Wales (Author)
  • David Rey - , Université Côte d'Azur (Author)
  • S. Travis Waller - , University of New South Wales (Author)
  • Michael W. Levin - , University of Minnesota System (Author)

Abstract

Networks are inherently uncertain and require scenario-based approaches to handle variability. In stochastic and time-dependent networks, optimal solutions cannot always be found using deterministic algorithms. Furthermore, Stochastic Time Dependent Shortest Path problems are known to be NP-hard. Emerging Quantum Computing Methods are providing new ways to address these problems. In this paper, the STDSP problem is formulated as a Quadratic Constrained Binary Optimization Problem. We show that in the case of independent link costs, the size of the problem increases exponentially. Finally, we find that using the quantum solver provides a linear computational experience with respect to the size of the problem. The proposed solution has implications for stochastic networks across different contexts including communications, traffic, industrial operations, electricity, water, broader supply chains, and epidemiology.

Details

Original languageEnglish
Pages (from-to)1–11
JournalTransportation letters
Volume2023
Publication statusAccepted/In press - 2023
Peer-reviewedYes
Externally publishedYes

Keywords

ASJC Scopus subject areas

Keywords

  • constrained quadratic optimization model, quantum annealing, quantum computing, Stochastic-time-dependent shortest path