4 papers
Practical quantum tokens: challenges and perspectives
Nadezhda P. Kukharchyk, Holger Boche, Christian Deppe +21
The concept of quantum tokens dates back alongside quantum cryptography to Stephen Wiesner's seminal work in 1983[1]. Already this initial work proposes society-relevant applicatio…
Security Analysis of Ensemble-Based Quantum Token Protocol Under Advanced Attacks
Bernd Bauerhenne, Lucas Tsunaki, Jan Thieme +2
We present and characterize advanced attacks on an ensemble-based quantum token protocol that allows for implementing non-clonable quantum coins. Multiple differently initialized t…
Ensemble-Based Quantum Token Protocol Benchmarked on IBM Quantum Processors
Lucas Tsunaki, Bernd Bauerhenne, Malwin Xibraku +3
Quantum tokens envision to store unclonable quantum states in a physical device, with the goal of being used for personal authentication protocols, as required by banks. Still, the…
Spectroscopic footprints of quantum friction in nonreciprocal and chiral media
O. J. Franca, Fabian Spallek, Steffen M. Giesen +4
We investigate how the quantum friction experienced by a polarizable atom moving with constant velocity parallel to a planar interface is modified when the latter consists of chira…