利用巨原子生成纠缠连续谱束缚态的反绝热准Floquet控制
Counterdiabatic quasi-Floquet control for the generation of entangled BICs using giant atoms
- Pontificia Universidad Católica de Chile（智利天主教 Pontificia 大学）
- Universidad Técnica Federico Santa María（费德里科·圣塔玛丽亚技术大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文提出一种利用巨原子和反绝热准Floquet控制生成高保真纠缠连续谱束缚态的方法，实现了高保真度纠缠制备与保持。
AI中文摘要：
连续谱中的束缚态（BICs）为在波导量子电动力学中保持纠缠提供了一种机制。在这里，我们利用两条编织巨原子构型中的量子控制技术，提出了一种鲁棒的方法来产生高保真度的纠缠BICs。该协议将有效原子-波导耦合的准Floquet调制与独立的相位控制原子交换相结合，为制备完整的缀饰BIC提供了受限的反绝热辅助。在无损耗有效模型中，我们通过快速控制协议获得了全态BIC保真度0.99992和无条件原子贝尔保真度0.99588。微观有限模式模拟验证了通道过程中的中心-边带描述，而静态校准误差扫描则量化了其控制容差。一项单独的微观研究考虑了弛豫和退相干，使用实验上合理的组件尺度，确定了有限的可用纠缠窗口以及整形耦合包络的益处。这些结果支持在所陈述的控制和噪声假设下，对缀饰纠缠进行受控制备、保持和检索。
英文摘要：
Bound states in the continuum (BICs) provide a mechanism for preserving entanglement in waveguide quantum electrodynamics. Here, using quantum control techniques in a configuration of two braided giant atoms, we propose a robust approach to create high-fidelity entangled BICs. The protocol combines quasi-Floquet modulation of the effective atom--waveguide couplings with an independent phase-controlled atomic exchange, which provides restricted counterdiabatic assistance for preparing the complete dressed BIC. In the lossless effective model, we obtain a full-state BIC fidelity of $0.99992$ and an unconditional atomic Bell fidelity of $0.99588$ using a fast control protocol. Microscopic finite-mode simulations validate the central-sideband description during the passage, while static calibration-error scans quantify its control tolerances. A separate microscopic study with relaxation and dephasing, using experimentally motivated component scales, identifies a finite useful entanglement window and a benefit from shaping the coupling envelopes. These results support controlled preparation, retention, and retrieval of dressed entanglement within the stated control and noise assumptions.
