标题： 在囚禁离子中量子Rabi模型的宇称对称性保护现象的实验观测 显示英文标题

标题： Experimental observation of parity-symmetry-protected phenomena in the quantum Rabi model with a trapped ion

摘要： 对称性对于了解物理系统的根本性质至关重要，它为研究诸如量子相变和基态纠缠等奇异现象提供了可能性。 在这里，我们实验模拟了一个高度可控制的扩展量子Rabi模型，在一个自旋-运动耦合的囚禁离子中，该模型能够调节到超强耦合或深耦合 regime。 我们观察到，在保持（破坏）宇称对称性的模型驱动下，声子在超强耦合 regime 中会经历双（单）激发。 在系统中出现强基态纠缠和量子叠加等量子现象时具有宇称对称性，这些现象在对称性破坏后消失。 我们还发现，在深耦合 regime 中，两能级系统熵和声子Wigner函数对对称性转变点附近的参数表现出敏感响应。 这项工作为探索对称性控制的量子现象及其在高精度量子技术中的应用提供了前景。 显示英文摘要

摘要： Symmetry is crucial for gaining insights into the fundamental properties of physical systems, bringing possibilities in studying exotic phenomena such as quantum phase transitions and ground state entanglement. Here, we experimentally simulate a highly controllable extended quantum Rabi model, capable of tuning into the ultra-strong or deep coupling regime, in a spin-motion-coupled trapped ion. We observe that the phonon driven by such a model with parity symmetry preserved (broken) would experience double (single) excitation in the ultra-strong coupling regime. Quantum phenomena such as strong ground state entanglement and quantum superposition in systems occur with parity symmetry, and these phenomena disappear following the symmetry breaking. We also find sensitive responses for the two-level system entropy and phonon Wigner function in the deep coupling regime, depending on the parameter across the symmetry transition point. This work offers the prospect of exploring symmetry-controlled quantum phenomena and their applications in high-precision quantum technologies.