Protocol for generation of high-dimensional entanglement from an array of non-interacting photon emitters
Protocol for generation of high-dimensional entanglement from an array of non-interacting photon emitters
复制标题
DOI：
10.1088/1367-2630/ac475d
复制
发表时间：
2021-12
影响因子：
3.3
通讯作者：
Thomas J. Bell;J. Bulmer;Alex E. Jones;S. Paesani;D. McCutcheon;A. Laing
中科院分区：
文献类型：
--
作者：
Thomas J. Bell;J. Bulmer;Alex E. Jones;S. Paesani;D. McCutcheon;A. Laing
将高维量子信息编码成单光子可以为量子技术提供各种好处，例如提高噪声弹性。然而，按需高效生成高维纠缠被认为是当前和不久的将来光子量子技术所无法达到的。我们提出了一个利用d个无相互作用的单光子发射器阵列近确定性地产生N光子d维光子Greenberger-Horne-Zeilinger（GHZ）态的方案。我们分析了量子发射器的常见误差源（如光子光谱可分辨性和时间失配）对性能的影响，发现它们很容易通过时间分辨检测进行校正，以产生多个量子点的高保真GHZ态。当应用于量子密钥分发场景时，我们的协议在增加二进制编码以外的维度时表现出更好的容错性和密钥速率。
Encoding high-dimensional quantum information into single photons can provide a variety of benefits for quantum technologies, such as improved noise resilience. However, the efficient generation of on-demand, high-dimensional entanglement was thought to be out of reach for current and near-future photonic quantum technologies. We present a protocol for the near-deterministic generation of N-photon, d-dimensional photonic Greenberger–Horne–Zeilinger (GHZ) states using an array of d non-interacting single-photon emitters. We analyse the impact on performance of common sources of error for quantum emitters, such as photon spectral distinguishability and temporal mismatch, and find they are readily correctable with time-resolved detection to yield high fidelity GHZ states of multiple qudits. When applied to a quantum key distribution scenario, our protocol exhibits improved loss tolerance and key rates when increasing the dimensionality beyond binary encodings.