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arXiv 1704.02130quant-ph
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利用次线性共享量子资源实现设备无关随机数生成

Device-independent randomness generation with sublinear shared quantum resources

Cédric Bamps, Serge Massar, Stefano Pironio

摘要:

在量子密码学中,设备无关(DI)协议可以被证明是安全的,而不需要对用于执行协议的设备的内部工作进行假设。为了显示非局域性,这是DI协议中的一个基本特征,该设备必须由至少两个共享纠缠的独立组件组成。这就提出了一个基本问题:运行这样的DI协议需要多少纠缠?我们提出了一个双设备协议的DI随机数产生(DIRNG),产生约$n$位的随机性从$n$对任意弱纠缠量子比特。我们还考虑了一个变体的协议,其中$m$单态被稀释成$n$部分纠缠态之前,执行第一个协议,并表明,单态的数量$m$只需要规模与随机位产生的数量$n$次线性。在操作上,这导致了远程实验室之间的DIRNG协议,该协议只需要亚线性量的量子通信来准备设备。

英文摘要:

In quantum cryptography, device-independent (DI) protocols can be certified secure without requiring assumptions about the inner workings of the devices used to perform the protocol. In order to display nonlocality, which is an essential feature in DI protocols, the device must consist of at least two separate components sharing entanglement. This raises a fundamental question: how much entanglement is needed to run such DI protocols? We present a two-device protocol for DI random number generation (DIRNG) which produces approximately $n$ bits of randomness starting from $n$ pairs of arbitrarily weakly entangled qubits. We also consider a variant of the protocol where $m$ singlet states are diluted into $n$ partially entangled states before performing the first protocol, and show that the number $m$ of singlet states need only scale sublinearly with the number $n$ of random bits produced. Operationally, this leads to a DIRNG protocol between distant laboratories that requires only a sublinear amount of quantum communication to prepare the devices.

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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