Entanglement Detection by Violations of Noisy Uncertainty Relations: A Proof of Principle
Entanglement Detection by Violations of Noisy Uncertainty Relations: A Proof of Principle
复制标题
通过违反噪声不确定性关系进行纠缠检测：原理证明
DOI：
10.1103/physrevlett.122.220401
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发表时间：
2019
影响因子：
8.6
通讯作者：
Wolf Ramona
中科院分区：
文献类型：
--
作者：
Zhao Yuan-Yuan;Xiang Guo-Yong;Hu Xiao-Min;Liu Bi-Heng;Li Chuan-Feng;Guo Guang-Can;Schwonnek Rene;Wolf Ramona
众所周知，局部不确定关系的违反可以用作纠缠存在的指标。不幸的是，这些非线性证人的实际使用已被限制在少数特殊情况下，在过去。然而，计算不确定性界限的新方法已经出现。在这里，我们报告的实验实施基于不确定性的纠缠证人，基准的制度占主导地位的强本地噪声。我们结合联合收割机的新的计算方法与本地噪声层析成像，以设计噪声适应纠缠证人。这个原理验证实验表明，量子噪声可以通过完全量子模型成功地处理，以提高检测纠缠的能力。
It is well known that the violation of a local uncertainty relation can be used as an indicator for the presence of entanglement. Unfortunately, the practical use of these nonlinear witnesses has been limited to few special cases in the past. However, new methods for computing uncertainty bounds have become available. Here we report on an experimental implementation of uncertainty-based entanglement witnesses, benchmarked in a regime dominated by strong local noise. We combine the new computational method with a local noise tomography in order to design noise-adapted entanglement witnesses. This proof-of-principle experiment shows that quantum noise can be successfully handled by a fully quantum model in order to enhance the ability to detect entanglement.