Building and Validating Advanced Quantum Systems

Anonymous

Jincheng Zhang

Quantum information, a cornerstone of modern technology, is increasingly vulnerable to attacks. Traditional cryptographic methods rely on the computational difficulty of mathematical problems, which are susceptible to noise and errors. This research introduces a novel approach leveraging quantum entropy – a fundamental property of quantum systems – to assess the security of quantum information systems. We propose a new cryptographic algorithm predicated on this entropy, demonstrating its potential to significantly enhance security through enhanced vulnerability analysis. The core mechanism involves quantifying the inherent uncertainty in a quantum system using quantum entropy, and then employing this uncertainty to build a robust, albeit probabilistic, cryptographic system. This paper outlines the theoretical framework, experimental validation, and potential applications of this approach, emphasizing its contribution to the advancement of quantum information security.

Jacob M. Taylor

Giorgio Minati, Giovanni Rodari, Emanuele Polino +5 more

Randomness certification is a foundational and practical aspect of quantum information science, essential for securing quantum communication protocols. Traditionally, these protocols have been implemented and validated with a single entanglement source, as in the paradigmatic Bell scenario. However, advancing these protocols to support more complex configurations involving multiple entanglement sources is key to building robust architectures and realizing large-scale quantum networks. Here, we show how to certify randomness in an entanglement-teleportation experiment, the building block of a quantum repeater displaying two independent sources of entanglement. Using the scalar extension method, we address the challenge posed by the nonconvexity of the correlation set, providing effective bounds on an eavesdropper's knowledge of the shared secret bits. Our theoretical model characterizes the certifiable randomness within the network and is validated through the analysis of experimental data from a photonic quantum network.

Megan Dahlhauser, Robin Blume-Kohout, Timothy J Proctor +1 more

Giorgio Minati, Giovanni Rodari, Emanuele Polino +5 more

Randomness certification is a foundational and practical aspect of quantum information science, essential for securing quantum communication protocols. Traditionally, these protocols have been implemented and validated with a single entanglement source, as in the paradigmatic Bell scenario. However, advancing these protocols to support more complex configurations involving multiple entanglement sources is key to building robust architectures and realizing large-scale quantum networks. In this work, we show how to certify randomness in an entanglement-teleportation experiment, the building block of a quantum repeater displaying two independent sources of entanglement. Utilizing the scalar extension method, we address the challenge posed by the non-convexity of the correlation set, providing effective bounds on an eavesdropper's knowledge of the shared secret bits. Our theoretical model characterizes the certifiable randomness within the network and is validated through the analysis of experimental data from a photonic quantum network.