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arXiv 2602.19306quant-ph
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质量无关的引力诱导纠缠

Mass-Independent Gravitationally Induced Entanglement

University College London(伦敦大学学院)

Lorenzo Braccini, Alessio Serafini, Sougato Bose

AI总结:

研究通过分析引力相互作用下的量子干涉仪,发现质量无关的纠缠相位,并利用其限制实验范围至介观质量。

摘要:

我们解析地求解了两个相互作用的史蒂文-格尔拉赫干涉仪(SGI)的纠缠量子动力学。每个SGI利用一个由量子比特施加的算符值力来产生和重新组合非高斯态物质。通过主导的引力相互作用生成的两个量子比特之间的纠缠相位被发现与质量无关,无论是单位元动力学还是开放动力学,无论初始状态的温度和压缩程度如何。进一步,我们展示四条干涉路径的解表明,仅存在相互作用并不允许中心质量的完美重新组合。这种二次效应以及更高阶的相互作用项可用于对质量进行上下界限制,从而将实验的范围限制在介观质量。通过求解包含扩散和退相位的开放动力学,初始压缩热态的加入使界限更加紧密。我们讨论了具有嵌入NV中心的磁性悬浮质量作为特定的物理实现。

英文摘要:

We analytically solve the entangling quantum dynamics of two interacting Stern-Gerlach Interferometers~(SGI). Each SGI exploits an operator-valued force applied by a qubit to create and recombine a non-Gaussian state of matter. The entangling phase between the two qubits generated by the leading-order gravitational interaction of the massive degrees of freedom is found to be mass-independent, both for unitary and open dynamics, irrespective of the temperature and squeezing of the initial states. Further, we show that the solution of the four interferometric paths reveals that the mere presence of the interaction does not allow for a perfect recombination of the centre of mass. This second-order effect, alongside higher-order interaction terms, can be used to bound the mass from above and below, thus restricting the experiment's regime to mesoscopic masses. By solving the open dynamics which includes diffusion and dephasing with initial squeezed thermal states, the bounds are tightened by the inclusion of realistic experimental noise. We discuss diamagnetic levitated masses with embedded NV-centres as a specific physical implementation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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