自旋-1系统的量子同步：加性林德布拉德算子带来的同步增强

中文摘要 AI 辅助

我们对最简单的量子系统之一——具有等间隔能级的受外驱动的少能级系统（等效为自旋-1系统）的量子同步进行了实验研究。通过与激发辅助态耦合，我们实现了与非常规耗散路径相关的加性有效林德布拉德（Lindblad）算子，研究表明在某些参数范围内这些算子可增强量子同步。实验装置采用了磁光阱（MOT）中的冷⁸⁷Rb原子，相关的同步提取协议通过专门的模拟进行了仔细的基准测试，实验与模拟之间发现了令人信服的一致性。本工作建立的耗散工程方法可轻易扩展到具有更多能级的系统，如等效自旋-3/2或自旋-2系统，对高自旋系统的量子同步研究以及广泛的量子科学研究和技术应用具有重要意义。

英文摘要

We experimentally investigate quantum synchronization for one of the simplest possible quantum systems, namely an externally driven few-level system with equally spaced energy levels effectively acting as a spin-1 system. Coupling to excited auxiliary states, we realize additive effective Lindblad operators that are associated with non-conventional dissipative pathways, which are shown to enhance, in certain parameter regimes, quantum synchronization. The experimental set-up, which utilizes cold $^{87}$Rb atoms in a MOT, and associated synchronization extraction protocol are benchmarked carefully through dedicated simulations. Convincing agreement is found between experiment and simulations. The dissipation engineering approach established in our work can be readily extended to systems with more energy levels, such as effective spin-$3/2$ or spin-$2$ systems, and has implications for quantum synchronization studies in higher-spin systems as well as for a wide range of quantum science studies and technology applications.

发表机构

• The University of Oklahoma（俄克拉荷马大学）
• Center for Quantum Research and Technology, The University of Oklahoma（俄克拉荷马大学量子研究与技术中心）
• Homer L. Dodge Department of Physics and Astronomy, The University of Oklahoma（俄克拉荷马大学霍默·L·多德物理与天文系）
• Oak Ridge National Laboratory（橡树岭国家实验室）

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