4/9 Device-Independent Quantum Rigidity for Secure Global Positioning

時間：4月9日(四) 13：20 ~ 15：10

題目：Device-Independent Quantum Rigidity for Secure Global Positioning

講者：郭恩瑞 助理教授

服務單位：國立陽明交通大學 電子物理系

地點：本校科學三館1樓 SC157

摘要：

Device-independent (DI) protocols provide the strongest form of security by removing trust assumptions on quantum devices and relying solely on observed nonlocal correlations and quantum rigidity. In this talk, I will discuss how multipartite Bell nonlocality and self-testing can be leveraged to secure distributed positioning tasks, using a quantum-secured global positioning system (GPS) as a concrete case study.

We consider a protocol based on a five-qubit entangled state shared among four satellites and one ground station, where correct state preparation and measurement behavior are certified solely from Bell inequality violations. I will explain how rigidity guarantees enable device-independent authentication against spoofing and cyberattacks, and discuss practical considerations in the NISQ era, including implementation trade-offs between superconducting and trapped-ion platforms, as well as constraints arising from long-distance photonic distribution.

The emphasis of the talk will be on conveying the core ideas of device-independence and self-testing, with sufficient background to make the discussion accessible to a broad quantum information audience.

For reference, the related paper of mine is available here:
https://link.springer.com/article/10.1140/epjqt/s40507-026-00470-6