论文标题
Hong-Ou-Mandel干扰的时间区分性：高维频率纠缠的产生和表征
Temporal distinguishability in Hong-Ou-Mandel interference: Generation and characterization of high-dimensional frequency entanglement
论文作者
论文摘要
高维量子纠缠目前是量子信息处理中最多产的领域之一，由于其高信息能力和误差弹性。长期以来，一种利用高维纠缠的多功能方法一直被誉为量子科学和技术的绝对必要性。在这里，我们利用Hong-ou-mandel干扰来操纵任意维克的空间中的离散频率纠缠。在理论上和实验研究中，两次，四维和六维频率纠缠的Qudits的产生和表征是在整个状态空间中估算纠缠维度的估计。此外，我们的策略可以推广到其他光子自由度的高维纠缠。我们的结果可能会更全面地了解频率塑造和干扰现象，并为更复杂的高维量子信息处理协议铺平道路。
High-dimensional quantum entanglement is currently one of the most prolific fields in quantum information processing due to its high information capacity and error resilience. A versatile method for harnessing high-dimensional entanglement has long been hailed as an absolute necessity in the exploration of quantum science and technologies. Here we exploit Hong-Ou-Mandel interference to manipulate discrete frequency entanglement in arbitrary-dimensional Hilbert space. The generation and characterization of two-, four- and six-dimensional frequency entangled qudits are theoretically and experimentally investigated, allowing for the estimation of entanglement dimensionality in the whole state space. Additionally, our strategy can be generalized to engineer higher-dimensional entanglement in other photonic degrees of freedom. Our results may provide a more comprehensive understanding of frequency shaping and interference phenomena, and pave the way to more complex high-dimensional quantum information processing protocols.
