AI 中文总结
本研究提出一项实验，通过阱中基态冷却的纳米物体，首次以完全设备无关方式无漏洞检验引力的贝尔非定域性，可构建、见证引力曲率纠缠并排除引力定域实在论描述。
AI 中文摘要
我们提出一项实验，用以检验引力场的贝尔非定域性（一种真正的非经典性）：将两个嵌入纠缠自旋的质量体（例如两颗带有纠缠NV中心自旋的金刚石）放置在彼此的光锥之外，确保场景无定域性漏洞；随后将这些自旋与各自质量体的运动耦合，以产生空间叠加态；最终仅对两个质量体的引力场进行局域测量。若引力是量子的，那么两个纠缠的质量体将使它们的引力场发生纠缠，进而产生可证明引力贝尔非定域性的关联。该实验仅需处于阱中且经基态冷却、具有微米级空间叠加态的纳米物体即可实现。此方案超越了近期检验引力非经典性的提案，首次在文献中提供了一套最小工具，可实现：（i）构建引力曲率的爱因斯坦-波多尔斯基-罗森（EPR）态；（ii）见证纠缠的引力曲率；（iii）排除引力的任何定域实在论描述；（iv）以完全设备无关的方式实现引力非经典性的无漏洞检验。
英文摘要
We propose an experiment to test Bell nonlocality, a genuine nonclassicality, for the gravitational field. Two masses with embedded entangled spins (e.g., two diamonds with their NV-centre spins entangled) are placed well outside each other's light cones, ensuring a locality-loophole-free scenario. The spins are then coupled to the motion of their respective masses to generate spatial superpositions. Finally, local measurements are performed only on the gravitational fields of the two masses. If gravity is quantum, then the two entangled masses would entangle their gravitational fields, leading to correlations certifying Bell nonlocality of gravity. Trapped and ground-state cooled nano-objects with micron-sized spatial superposition are sufficient for this test. This goes beyond the recent proposals to test nonclassicality of gravity by providing, for the first time in the literature, a minimal tool to (i) create Einstein-Podolsky-Rosen (EPR) state of gravitational curvatures, (ii) witness entangled gravitational curvatures, (iii) rule out any local-realist description of gravity, and (iv) achieve a loophole-free test of gravity's nonclassicality in a fully device-independent way.
CommentsPreliminary Draft. Comments are Welcome
