偶宇称贝尔态的手性转移与纠缠生成：基于工程化双光子损耗

中文摘要 AI 辅助

我们研究了在具有相干双光子驱动和工程化双光子损耗的双量子位系统中，偶宇称贝尔态的手性转移和耗散生成。我们发现，绝热环绕二阶奇异点会诱导贝尔态$|\Phi^+\rangle$与$|\Phi^-\rangle$之间的方向依赖转移，该转移由时间积分的低损耗分支选择机制控制。我们发展了一种混合李雅普诺夫描述，带有控制参数$q$，该参数在条件性无跳跃动力学与无条件林德布拉德演化之间插值，并利用它评估在量子跳跃存在时奇异点诱导的手性如何存续。当相同的参数回路从可分离态$|00\rangle$初始化时，它直接生成强偶宇称纠缠。综合来看，这些结果将耗散贝尔态控制扩展到单激发流形之外，并进一步证明基于奇异点的协议可以在单一工程化双光子平台上统一手性态转移与纠缠生成。

英文摘要

We investigate chiral transfer and dissipative generation of even-parity Bell states in a two-qubit system with coherent two-photon driving and engineered two-photon loss. We find that adiabatic encirclement of a second-order exceptional point induces direction-dependent transfer between the Bell states $|Φ^+\rangle$ and $|Φ^-\rangle$, governed by a time-integrated low-loss branch-selection mechanism. We develop a hybrid-Liouvillian description with a control parameter $q$ that interpolates between conditional no-jump dynamics and unconditional Lindblad evolution, and use it to assess how exceptional-point-induced chirality survives in the presence of quantum jumps. When the same parameter loop is initialized in the separable state $|00\rangle$, it directly generates strong even-parity entanglement. Together, these results extend dissipative Bell-state control beyond the single-excitation manifold. They further demonstrate that exceptional-point-based protocols can unify chiral state transfer and entanglement generation within a single engineered two-photon platform.

发表机构

• School of Electronic Science and Engineering, Chongqing University of Posts and Telecommunications（重庆邮电大学电子科学与工程学院）
• Chongqing Key Laboratory of Dedicated Quantum Computing and Quantum Artificial Intelligence（重庆专用量子计算与量子人工智能重点实验室）
• Southwest Center for Theoretical Physics, Chongqing University（重庆大学西南理论物理中心）
• Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics, Chongqing University（重庆大学物理系及强耦合物理重庆市重点实验室）

机构由 AI 辅助整理，请以论文原文为准。

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9 pages, 5 figures, 1 table