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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| Online Access: | https://arxiv.org/abs/2602.10621 |
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| _version_ | 1866911439934980096 |
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| author | Kukharchyk, Nadezhda P. Boche, Holger Deppe, Christian Fedorov, Kirill G. Garcia, Martin E. Gerhardt, Ilja Gross, Rudolf Halfmann, Thomas Huebl, Hans Hunger, David Kilian, Wolfgang Kolesov, Roman Krämer, Juliane Kubanek, Alexander Müller, Kai Naydenov, Boris Nötzel, Janis Ovvyan, Anna P. Pernice, Wolfram H. P. Pieplow, Gregor Popov, Cyril Schröder, Tim Singer, Kilian Wolters, Janik |
| author_facet | Kukharchyk, Nadezhda P. Boche, Holger Deppe, Christian Fedorov, Kirill G. Garcia, Martin E. Gerhardt, Ilja Gross, Rudolf Halfmann, Thomas Huebl, Hans Hunger, David Kilian, Wolfgang Kolesov, Roman Krämer, Juliane Kubanek, Alexander Müller, Kai Naydenov, Boris Nötzel, Janis Ovvyan, Anna P. Pernice, Wolfram H. P. Pieplow, Gregor Popov, Cyril Schröder, Tim Singer, Kilian Wolters, Janik |
| contents | 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 applications such as secure quantum banknotes, which can be exchanged between a bank and a customer. This quantum currency is based on various physical states that can be easily verified but is protected from being copied by the fundamental quantum laws. Four decades later, these ideas have flourished in the field of quantum information, and the concept of quantum banknotes has not only adopted many varying names, such as quantum money, quantum coins, quantum-digital payments, and quantum tokens, but also reached its first experimental demonstrations. In this perspective article, we discuss the current state-of-the-art of quantum tokens in the field of quantum information, as well as their future perspectives. We present a number of physical realizations of quantum tokens with integrated quantum memories and their applicability scenarios in detail. Finally, we discuss how quantum tokens fit into the information security ecosystem and consider their relationship to post-quantum cryptography. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_10621 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Practical quantum tokens: challenges and perspectives Kukharchyk, Nadezhda P. Boche, Holger Deppe, Christian Fedorov, Kirill G. Garcia, Martin E. Gerhardt, Ilja Gross, Rudolf Halfmann, Thomas Huebl, Hans Hunger, David Kilian, Wolfgang Kolesov, Roman Krämer, Juliane Kubanek, Alexander Müller, Kai Naydenov, Boris Nötzel, Janis Ovvyan, Anna P. Pernice, Wolfram H. P. Pieplow, Gregor Popov, Cyril Schröder, Tim Singer, Kilian Wolters, Janik Quantum Physics Applied Physics 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 applications such as secure quantum banknotes, which can be exchanged between a bank and a customer. This quantum currency is based on various physical states that can be easily verified but is protected from being copied by the fundamental quantum laws. Four decades later, these ideas have flourished in the field of quantum information, and the concept of quantum banknotes has not only adopted many varying names, such as quantum money, quantum coins, quantum-digital payments, and quantum tokens, but also reached its first experimental demonstrations. In this perspective article, we discuss the current state-of-the-art of quantum tokens in the field of quantum information, as well as their future perspectives. We present a number of physical realizations of quantum tokens with integrated quantum memories and their applicability scenarios in detail. Finally, we discuss how quantum tokens fit into the information security ecosystem and consider their relationship to post-quantum cryptography. |
| title | Practical quantum tokens: challenges and perspectives |
| topic | Quantum Physics Applied Physics |
| url | https://arxiv.org/abs/2602.10621 |