论文标题
真正依赖设备的纠缠子空间认证
Device-Independent Certification of Genuinely Entangled Subspaces
论文作者
论文摘要
自我测试是一种以最小信任水平来表征量子资源的过程。到目前为止，它已被用作与设备无关的认证工具，用于特定的量子测量，通道和纯纠缠状态。在这项工作中，我们介绍了自我测试更一般的纠缠结构的概念。更确切地说，我们介绍了纠缠子空间的第一个自我测试 - 五数分的代码和感谢您的代码。我们表明，所有量子状态都最大程度地违反了适当选择的铃铛不平等，必须属于相应的代码子空间，这也包括混合状态。
Self-testing is a procedure for characterizing quantum resources with the minimal level of trust. Up to now it has been used as a device-independent certification tool for particular quantum measurements, channels, and pure entangled states. In this work we introduce the concept of self-testing more general entanglement structures. More precisely, we present the first self-tests of an entangled subspace - the five-qubit code and the toric code. We show that all quantum states maximally violating a suitably chosen Bell inequality must belong to the corresponding code subspace, which remarkably includes also mixed states.
