Abstract

In spite of the fact that quantum cryptography is currently the only field of quantum informatics that has been developed from the fundamental physical principles of quantum mechanics to practical applications in the field of transmission and security of information, many results remain, in our opinion, obscure to a wide physics community. The goal of the present study is to give, using minimal and simple mathematical tools, a simple and physically intuitively clear interpretation of the central result of quantum cryptography—a key secrecy criterion based on the trace metric—the distance between two quantum states. The interpretation proposed is self-sufficient and uses the standard Born quantum statistical interpretation of the density matrix—a quantum ensemble—a statistical mixture of quantum states.

中文翻译：

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量子密码学中关键保密标准的简单量子统计解释

摘要

尽管事实上，量子密码术是从量子力学的基本物理原理发展到信息传输和安全领域的实际应用的唯一的量子信息学领域，但我们认为许多结果仍然晦涩难懂广泛的物理学界。本研究的目标是使用最少和简单的数学工具，对量子密码学的主要结果（基于跟踪度量的关键保密标准）的简单直观的直观解释，即两个量子态之间的距离。提出的解释是自给自足的，并使用密度矩阵的标准Born量子统计解释-量子集合-量子态的统计混合。