Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TUE: Tuesday Contributed Sessions
TUE 1: QIP Implementations: Photons III
TUE 1.7: Vortrag
Dienstag, 9. September 2025, 15:45–16:00, ZHG001
Experimental Quantum Strong Coin Flipping using a Deterministic Single-Photon Source — •Koray Kaymazlar1, Daniel Vajner1, Fenja Drauschke2, Lucas Rickert1, Martin von Helversen1, Shulun Li3, Zhichuan Niu3, Anna Pappa2, and Tobias Heindel1 — 1Institute of Physics and Astronomy, Technische Univeristät Berlin, Germany — 2Electrical Engineering and Computer Science Department, Technische Univeristät Berlin, Germany — 3Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China
Strong coin flipping (SCF) is a fundamental cryptographic protocol allowing two distrustful parties to agree on randomly generated bit. In this work, we report the first implementation of a quantum strong coin flipping protocol that yields a quantum advantage compared to both its classical counterpart and an implementation using weak coherent pulses [1]. The quantum advantage is enabled by employing a state-of-the-art deterministic single-photon source based on a quantum dot embedded in a high-Purcell microcavity. Using a fiber-based electro-optic modulator (EOM) we realize fast dynamic, random polarization-state encoding at 80 MHz clock-rate. Our QSCF implementation enables a coin flipping rate of 1.5 kHz and an average quantum bit error ratio (QBER) below 3%, sufficient to realize a quantum advantage.
[1] D. A. Vajner, K. Kaymazlar, F. Drauschke, L. Rickert, M. von Helversen, H. Liu, S. Li, H. Ni, Z. Niu, A. Pappa, T. Heindel, Single-Photon Advantage in Quantum Cryptography Beyond QKD, arXiv:2412.14993 (2024)
Keywords: Coin Flipping Protocol; Quantum Dot; Single Photon; Quantum Advantage; Quantum Cryptography