Secure Networks of Quantum Sensors

Congratulations Dr.Scheiner!

Abstract

Quantum networks provide a powerful framework for interconnecting spatially separated quantum systems and enabling the distribution of quantum resources across multiple nodes. Such platforms offer new possibilities for tasks including secure communication, distributed computation, and quantum-enhanced sensing. Consequently, they have attracted increasing attention over the past decades from both the theoretical and experimental quantum information communities.

This thesis investigates the interplay between estimation precision, privacy, and security in distributed quantum sensing. It develops methods to identify optimal probe states for privately estimating linear combinations of parameters in quantum sensor networks, quantifies privacy in the presence of noise, and establishes privacy guarantees for relevant families of quantum states. It also extends these protocols to incorporate anonymity, and explores graph-state-based approaches and analyses privacy in such scenarios.