Extracting perfect GHZ states from imperfect weighted graph states via entanglement concentration
Extracting perfect GHZ states from imperfect weighted graph states via entanglement concentration
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DOI：
10.1103/physrevresearch.5.023124
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发表时间：
2022-03
影响因子：
4.2
通讯作者：
R. Frantzeskakis;Chenxu Liu;Zahra Raissi;Edwin Barnes;S. Economou
中科院分区：
文献类型：
--
作者：
R. Frantzeskakis;Chenxu Liu;Zahra Raissi;Edwin Barnes;S. Economou
光子GHz态是量子信息科学中许多重要应用的核心资源，包括秘密共享、传感和基于聚变的量子计算。使用光子发射器纠缠门是一种很有希望的方法来创建这些状态，避免了许多与基于线性光学的内在概率方法相关的困难。然而，由于产生过程中的相干和非相干误差，有效地创建多个光子的高保真GHz态仍然是一个突出的挑战。在这里，我们提出了一个纠缠集中协议，它能够仅使用局域门和不完美加权图态上的测量来产生完美GHZ态。我们证明了我们的协议对非相干噪声错误是有效的和健壮的。
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.