论文标题
在存在未知相互作用的情况下见证重力的非古典性质
Witnessing the non-classical nature of gravity in the presence of unknown interactions
论文作者
论文摘要
作为经典田地理论的一般相对论不能预测重力引起的纠缠，因此，最近的建议寻求对这一特征的经验证明，这将代表物理学的重要里程碑。我们对旋转证人协议的改进进行了改进，该协议减少了高度挑战性的实验要求。严格评估了原始提案的近似值之后[S. Bose等。物理。莱特牧师。 119，240401（2017）]，我们专注于纠缠见证。我们提出了一个新的证人，该证人大大减少了所需的相互作用时间，从而使实验可用于更高的退积率，并且我们展示了统计分析如何将重力贡献与其他可能占主导地位和不知名的相互作用分开。我们指出一个潜在的漏洞，并显示如何使用状态断层扫描如何将其关闭。
General relativity as a classical field theory does not predict gravitationally induced entanglement, as such, recent proposals seek an empirical demonstration of this feature which would represent a significant milestone for physics. We introduce improvements to a spin witness protocol that reduce the highly challenging experimental requirements. After rigorously assessing approximations from the original proposal [S. Bose et al. Phys. Rev. Lett. 119, 240401 (2017)], we focus on entanglement witnessing. We propose a new witness which greatly reduces the required interaction time, thereby making the experiment feasible for higher decoherence rates, and we show how statistical analysis can separate the gravitational contribution from other possibly dominant and ill-known interactions. We point out a potential loophole and show how it can be closed using state tomography.
