非凡的纠缠现象：非厄米性与非经典性的交汇
Exceptional entanglement phenomena: non-Hermiticity meeting non-classicality
AI总结：
本研究通过揭示非厄米量子系统奇异点处的纠缠转变，解决了非厄米特征与经典物理彻底背离的根本问题，并在电路量子电动力学系统中实验验证了纯量子力学非厄米效应。
摘要：
量子力学哈密顿量的非厄米（NH）扩展是物理学中最重要的进展之一。在过去二十年中，众多引人入胜的非厄米现象已被揭示和验证，但这些现象均可出现在量子系统和经典系统中。这引出了一个根本性问题：什么样的非厄米特征标志着与经典物理学的彻底背离？解决这一问题对于探索真正的非厄米量子力学不可或缺，但迄今为止在实验上仍未触及。在此，我们通过揭示独特的非凡纠缠现象（以纠缠转变为例）解决了这一基本问题，该现象发生在非厄米相互作用量子系统的奇异点处。我们利用电路量子电动力学架构中构建的自然耗散光-物质系统，展示并验证了这些纯量子力学的非厄米效应。我们的结果为真正量子力学非厄米物理的研究奠定了基础，其标志是奇异点引发的纠缠行为。
英文摘要：
Non-Hermitian (NH) extension of quantum-mechanical Hamiltonians represents one of the most significant advancements in physics. During the past two decades, numerous captivating NH phenomena have been revealed and demonstrated, but all of which can appear in both quantum and classical systems. This leads to the fundamental question: what NH signature presents a radical departure from classical physics? The solution of this problem is indispensable for exploring genuine NH quantum mechanics, but remains experimentally untouched so far. Here, we resolve this basic issue by unveiling distinct exceptional entanglement phenomena, exemplified by an entanglement transition, occurring at the exceptional point of NH interacting quantum systems. We illustrate and demonstrate such purely quantum-mechanical NH effects with a naturally dissipative light-matter system, engineered in a circuit quantum electrodynamics architecture. Our results lay the foundation for studies of genuinely quantum-mechanical NH physics, signified by exceptional-point-enabled entanglement behaviors.
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