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arXiv 2008.02294quant-ph
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基于量子纠缠的概率性一次性程序

Probabilistic one-time programs using quantum entanglement

Marie-Christine Roehsner, Joshua A. Kettlewell, Joseph Fitzsimons, Philip Walther

AI总结:

本文提出一种利用纠缠量子比特对改进的概率性一次性程序协议,解决了先前方案需即时使用和光学切换的缺陷,实现了计数率提高四个数量级及延迟执行,并在维也纳地下光纤链路演示,兼容量子互联网。

摘要:

众所周知,量子技术为量子计算机以及量子辅助的经典计算机提供了前所未有的数据和软件保护水平。为了利用这些特性,人们开发了概率性一次性程序,其中将经典软件编码到微小的量子态中,使得计算机程序只能被使用一次。这种自毁式的一次性程序促进了从软件分发到签名权限的一次性委托等多种新应用。尽管最初的原理验证实验证明了此类方案的可行性,但由于需要即时使用软件,加上需要主动光学切换和大量经典通信等技术挑战,实际应用受到了限制。在此,我们提出了一种改进的一次性程序协议,通过使用纠缠的量子比特对,解决了先前方案的主要缺陷。这带来了计数率提高四个数量级,并且能够在量子信息交换发生很久之后执行程序。我们在维也纳市中心大学建筑之间的地下光纤链路上演示了我们的协议。最后,结合我们实现的一次性签名权限委托,这强调了我们的方案与制备-测量量子互联网网络的兼容性。

英文摘要:

It is well known that quantum technology allows for an unprecedented level of data and software protection for quantum computers as well as for quantum-assisted classical computers. To exploit these properties, probabilistic one-time programs have been developed, where the encoding of classical software in small quantum states enables computer programs that can be used only once. Such self-destructing one-time programs facilitate a variety of new applications reaching from software distribution to one-time delegation of signature authority. Whereas first proof-of-principle experiments demonstrated the feasibility of such schemes, the practical applications were limited due to the requirement of using the software on-the-fly combined with technological challenges due to the need for active optical switching and a large amount of classical communication. Here we present an improved protocol for one-time programs that resolves major drawbacks of previous schemes, by employing entangled qubit pairs. This results in four orders of magnitude higher count rates as well the ability to execute a program long after the quantum information exchange has taken place. We demonstrate our protocol over an underground fiber link between university buildings in downtown Vienna. Finally, together with our implementation of a one-time delegation of signature authority this emphasizes the compatibility of our scheme with prepare-and-measure quantum internet networks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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