Freiburg 2019 – wissenschaftliches Programm
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FM: Fall Meeting
FM 18: Quantum Networks: Interfaces & Hybrid Systems
FM 18.3: Talk
Montag, 23. September 2019, 17:15–17:30, 1015
Device-indepedent certification of quantum network link — •Xavier Valcarce1, Jean-Daniel Bancal1, Kai Redeker2, Pavel Sekatski1, Wenjamin Rosenfeld3,2, and Nicolas Sangouard1 — 1Quantum Optics Theory Group, Universität Basel, CH-4056 Basel, Switzerland — 2Department fur Physik, Ludwig-Maximilians-Universität, 80797 Munchen, Germany — 3Max-Planck-Institut fur Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, German
Device-independent characterization, also known as self-testing, provides a certification of devices from the result of a Bell test that is suitable for a wide range of applications. We here show advantages and recently derived limits of CHSH self-test, as well as how it can be used in an elementary link of a quantum network. Being based on a Bell test free of detection and locality loopholes, our certification is fully device-independent, that is, it does not rely on a knowledge of how the devices work. This guarantees that our link can be integrated in a quantum network for performing long-distance quantum communications with security guarantees that are independent of the details of the actual implementation.