Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 70: Quantum Optics
Q 70.4: Talk
Friday, March 15, 2024, 15:15–15:30, HS 3118
Proposal for an experimental demonstration of unforgeable quantum tokens in a room-temperature atomic memory — •Luisa Esguerra1,2, Elizabeth Robertson1,2, Helen Chrzanowski1, Inna Kviatkovski3,1, Leon Meßner1, Norman Vincenz Ewald1,4, Mathieu Bozzio5, and Janik Wolters1,2 — 1German Aerospace Center (DLR), Institute of Optical Sensor Systems, Berlin — 2TU Berlin, Institut für Optik und Atomare Physik — 3TU Berlin, Institut für Luft und Raumfahrt — 4Physikalisch-Technische Bundesanstalt, FB 8.2 Biosignale, Berlin — 5University of Vienna, Faculty of Physics, Vienna Center for Quantum Science and Technology (VCQ)
Alkali vapor cell quantum memories offer a simple platform for a plethora of applications in quantum information technologies. In this context, the efficient and low-noise storage of quantum tokens for authentication purposes remains an outstanding challenge. Inspired by a proposal for quantum money [1,2], we develop a quantum-token protocol based on a time-bin encoding, and use the memory system presented in [3] as a test platform for secure storage of the quantum token. This constitutes an important first step towards the realisation of authentification tokens secured by quantum mechanics.
[1] M. Bozzio et al., npj Quantum Inf 4, 5 (2018).
[2] M. Bozzio et al., Phys. Rev. A 99, 022336 (2019).
[3] L. Esguerra et al., Phys. Rev. A 107, 042607 (2023).
Keywords: Quantum; Memory; Token; Cesium; EIT