论文标题
可实施的混合纠缠见证人
Implementable Hybrid Entanglement Witness
论文作者
论文摘要
量子信息的混合编码是实现光学量子协议的有前途的方法。它结合了编码的连续变量的优势，例如高效率，与离散变量（例如高保真度）相结合。特别是，纠缠的混合状态被证明是量子信息协议的宝贵杂物。在这项工作中，我们提出了一个混合纠缠见证人，该证人可以在当前可用的实验上实施，并且对量子光学设置中当前观察到的噪声非常有力。拟议的证人基于对真正混合可观察物的测量。我们认为的噪声模型是一般的。它的正式特征是Kraus操作员，因为所考虑的混合系统可以以有限的尺寸表示。证人的实践优势是可以通过仅测量一些实验可用的可观察结果来对其进行测试。
Hybrid encoding of quantum information is a promising approach towards the realisation of optical quantum protocols. It combines advantages of continuous variables encoding, such as high efficiencies, with those of discrete variables, such as high fidelities. In particular, entangled hybrid states were shown to be a valuable ressource for quantum information protocols. In this work, we present a hybrid entanglement witness that can be implemented on currently available experiments and is robust to noise currently observed in quantum optical set-ups. The proposed witness is based on measurements of genuinely hybrid observables. The noise model we consider is general. It is formally characterised with Kraus operators since the considered hybrid system can be expressed in a finite dimension basis. A practical advantage of the witness is that it can be tested by measuring just a few experimentally available observables.
