One-Way Quantum Computing with Untrusted Networks

  • Event Date: 2025-10-27
  • Quantum information and communication
  • Speaker: Dr. Shih-Hsuan Chen (Dept. of Engineering Science, NCKU)  /  Host: Prof. Chung-Hsien Chou (NCKU)
    Place: R36173, 1F, Dept. of Physics, Building of Science College, NCKU

Time:12:10, Monday, October 27, 2025
Speaker:Dr. Shih-Hsuan Chen
              Dept. of Engineering Science, NCKU
Title: One-Way Quantum Computing with Untrusted Networks
Place : R36173, 1F, Dept. of Physics, Building of Science College, NCKU

Abstract:
One-way quantum computing utilizes entanglement networks to process quantum information among endpoint nodes. However, in real-world, noisy, and imperfect scenarios, quantum nodes can become untrusted and may deteriorate into classical states of pre-existing data, compromising the accuracy of the resulting computations. Here, we present a metric to benchmark the advantages of one-way quantum computing over alternatives that rely on networks of classical nodes. This metric extends genuine multipartite Einstein-Podolsky-Rosen steering from describing static states to characterizing quantum computing processes, effectively distinguishing them from any computing performed by networks that incorporate classical nodes. We use this metric to experimentally quantify the advantages of four-qubit entangled states of polarized photons in one-way quantum computing processes for a universal gate set, which includes the Hadamard, T, and controlled-NOT gates. Our results assist in evaluating and enhancing practical quantum information related to one-way quantum computing.

1/0