Experimental preparation and verification of quantum money
Jian-Yu Guan, Juan Miguel Arrazola, Ryan Amiri, Weijun Zhang, Hao Li,, Lixing You, Zhen Wang, Qiang Zhang, Jian-Wei Pan

TL;DR
This paper reports an experimental demonstration of creating and verifying unforgeable quantum banknotes, showing the practicality of quantum money with current technology and a security analysis accounting for experimental imperfections.
Contribution
It presents the first experimental implementation of quantum money preparation and verification with a comprehensive security analysis considering real-world imperfections.
Findings
Measured 3.6 million states in one verification round
Limited forging probability to 10^-7
Demonstrated feasibility of quantum banknotes with current techniques
Abstract
A quantum money scheme enables a trusted bank to provide untrusted users with verifiable quantum banknotes that cannot be forged. In this work, we report an experimental demonstration of the preparation and verification of unforgeable quantum banknotes. We employ a security analysis that takes experimental imperfections fully into account. We measure a total of states in one verification round, limiting the forging probability to based on the security analysis. Our results demonstrate the feasibility of preparing and verifying quantum banknotes using currently available experimental techniques.
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