Freiburg 2019 – wissenschaftliches Programm
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FM: Fall Meeting
FM 7: Secure Communication & Computation I
FM 7.3: Talk
Montag, 23. September 2019, 14:30–14:45, 1009
Secure quantum remote state preparation of squeezed microwave states — •S. Pogorzalek1,2, K. G. Fedorov1,2, M. Renger1,2, Q.-M. Chen1,2, M. Partanen1, E. Xie1,2, A. Marx1, F. Deppe1,2,3, and R. Gross1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2Physik-Department, TU München, 85748 Garching, Germany — 3Munich Center for Quantum Science and Technology (MCQST), Schellingstr. 4, 80799 Munich, Germany
Quantum communication protocols employ nonclassical correlations as a resource for an efficient transfer of quantum states. As a fundamental protocol, remote state preparation (RSP) aims at the preparation of a known quantum state at a remote location using classical communication and quantum entanglement. We use flux-driven Josephson parametric amplifiers and linear circuit elements in order to generate propagating two-mode squeezed (TMS) microwave states acting as our quantum resource. Combined with a feedforward, we use the TMS states to experimentally demonstrate the continuous-variable RSP protocol by preparing single-mode squeezed states at a distant location [1]. Finally, security of RSP is investigated by using the concept of the one-time pad and measuring the von Neumann entropies.
We acknowledge support by Germany’s Excellence Strategy EXC-2111-390814868, Elite Network of Bavaria through the program ExQM, the European Union via the Quantum Flagship project QMiCS (Grant No. 820505).
[1] S. Pogorzalek et al., Nat. Commun. 10, 2604 (2019).