论文标题
通过纠缠浓度从不完美的加权图状态中提取完美的GHz状态
Extracting perfect GHZ states from imperfect weighted graph states via entanglement concentration
论文作者
论文摘要
光子GHz状态是量子信息科学中许多重要应用的中心资源，包括秘密共享，传感和基于融合的量子计算。使用光子发射器纠缠门是创建这些状态的一种有前途的方法，该状态避免了基于线性光学器件的本质上概率方法相关的许多困难。但是，由于在发电过程中既连贯且不连贯的错误，因此许多光子的高保真GHz状态的有效创造仍然是一个重大挑战。在这里，我们提出了一种纠缠浓度方案，该方案能够仅使用本地门和不完美的加权图状态生成完美的GHz状态。我们表明，我们的协议既有效又鲁棒，对于不连贯的噪声错误。
Photonic GHZ states serve as the central resource for a number of important applications in quantum information science, including secret sharing, sensing, and fusion-based quantum computing. The use of photon-emitter entangling gates is a promising approach to creating these states that sidesteps many of the difficulties associated with intrinsically probabilistic methods based on linear optics. However, the efficient creation of high-fidelity GHZ states of many photons remains an outstanding challenge due to both coherent and incoherent errors during the generation process. Here, we propose an entanglement concentration protocol that is capable of generating perfect GHZ states using only local gates and measurements on imperfect weighted graph states. We show that our protocol is both efficient and robust to incoherent noise errors.
