论文标题

吸收量子记忆之间的纠缠产生的模拟

Simulation of Entanglement Generation between Absorptive Quantum Memories

论文作者

Zang, Allen, Kolar, Alexander, Chung, Joaquin, Suchara, Martin, Zhong, Tian, Kettimuthu, Rajkumar

论文摘要

量子纠缠是量子网络的重要资源。但是,在远程网络节点上的物理设备之间的纠缠生成是实现量子网络的一项艰巨的任务。在这项工作中,我们使用团队开发的量子网络通信(序列)的开源模拟器来模拟在Argonne-Chicago量子网络上部署的两个原子频率梳子(AFC)吸收量子记忆之间的纠缠产生。我们认识到序列中截短的Fock空间内光子量子状态的表示,并为自发参数下转换(SPDC)源,AFC吸收量子记忆和使用非数量分辨率的光子检测器构建模型。基于这些发展,我们观察到具有SPDC源平均光子数的变化忠诚度,并且具有平均光子数和记忆模式数的变化纠缠产生速率。我们还模拟了从量子记忆中检索到的两分光子状态的有效密度基质的断层造影重建。我们的工作通过新的硬件模块和Fock状态表示扩展了序列模拟器的可用性,该模拟器将改善近期量子网络硬件和协议的模拟。

Quantum entanglement is an essential resource for quantum networks. However, the generation of entanglement between physical devices at remote network nodes is a challenging task towards practical implementation of quantum networks. In this work, we use the open-source Simulator of QUantum Network Communication (SeQUeNCe), developed by our team, to simulate entanglement generation between two atomic frequency comb (AFC) absorptive quantum memories to be deployed on the Argonne-Chicago quantum network. We realize the representation of photonic quantum states within truncated Fock spaces in SeQUeNCe and build models for a spontaneous parametric down-conversion (SPDC) source, AFC absorptive quantum memories, and measurement devices with non-number-resolving photon detectors. Based on these developments, we observe varying fidelity with SPDC source mean photon number, and varying entanglement generation rate with both mean photon number and memory mode number. We also simulate tomographic reconstruction of the effective density matrix for the bipartite photonic states retrieved from quantum memories. Our work extends the usability of the SeQUeNCe simulator with new hardware modules and Fock state representation that will improve the simulation of near term quantum network hardware and protocols.

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