تقرير
Finite-size analysis of prepare-and-measure and decoy-state QKD via entropy accumulation
| العنوان: | Finite-size analysis of prepare-and-measure and decoy-state QKD via entropy accumulation |
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| المؤلفون: | Kamin, Lars, Arqand, Amir, George, Ian, Lütkenhaus, Norbert, Tan, Ernest Y. -Z. |
| سنة النشر: | 2024 |
| المجموعة: | Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics |
| الوصف: | An important goal in quantum key distribution (QKD) is the task of providing a finite-size security proof without the assumption of collective attacks. For prepare-and-measure QKD, one approach for obtaining such proofs is the generalized entropy accumulation theorem (GEAT), but thus far it has only been applied to study a small selection of protocols. In this work, we present techniques for applying the GEAT in finite-size analysis of generic prepare-and-measure protocols, with a focus on decoy-state protocols. In particular, we present an improved approach for computing entropy bounds for decoy-state protocols, which has the dual benefits of providing tighter bounds than previous approaches (even asymptotically) and being compatible with methods for computing min-tradeoff functions in the GEAT. Furthermore, we develop methods to incorporate some improvements to the finite-size terms in the GEAT, and implement techniques to automatically optimize the min-tradeoff function. Our approach also addresses some numerical stability challenges specific to prepare-and-measure protocols, which were not addressed in previous works. Comment: Added two appendices and fixed typos. The code used to prepare the results in this paper will be available at https://openqkdsecurity.wordpress.com/repositories-for-publications/ |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2406.10198 |
| رقم الأكسشن: | edsarx.2406.10198 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |