Gravity Induced Quantum Entanglement: Methodologies & Noise Control

引力引起的量子纠缠：方法论

• 批准号: 2732458
• 金额: --
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2732458
• 关键词: Gravity; Induced; Quantum; Entanglement; Methodologies

It is still not known whether gravity is a quantum mechanical force. Although there are quite a few theories of quantum gravity, which all agree with each other in the low energy limit and are consistent with observations, there is still no empirical proof as to whether gravity is quantum. With this in mind, in this project, we will work towards refining a class of proposed experiment, which, while working in the low energy limit, can certify whether gravity is fundamentally quantum in nature. These class of experiments are based on entangling two nearby masses purely through their gravitational interaction. As a classical mediator cannot entangle two masses (can be justified in several ways), an observation of entanglement will certify gravity to be quantum. The current project will seek to(i) Create robust ways to generate superpositions of a large mass in two distinct places -- for example involving many spins embedded inside macro-objects. These will be then used to generate and evidence the gravitational entanglement.(ii) The robustness and tolerance of such schemes to environment induced decoherence will be studied and quantum control schemes will be used to enhance the robustness.(iii) Usage of additional sensors to detect and take into account the ambient noise will be formulated.

引力是否是一种量子力学的力还不清楚。虽然有相当多的量子引力理论，它们在低能量极限下都是相互一致的，并且与观测相一致，但引力是否是量子的，仍然没有经验证明。考虑到这一点，在这个项目中，我们将致力于改进一类拟议的实验，该实验在低能量极限下工作时，可以证明引力在本质上是否是量子的。这类实验是基于纯粹通过引力相互作用纠缠两个邻近的质量。由于经典介体不能纠缠两个质量（可以用几种方式证明），纠缠的观察将证明引力是量子的。目前的项目将寻求（i）创造强有力的方法，在两个不同的地方产生大质量的叠加-例如，涉及嵌入宏观物体内部的许多自旋。这些将被用来产生和证明引力纠缠。(ii)我们将研究这些方案对环境诱导退相干的鲁棒性和容忍度，并将使用量子控制方案来增强鲁棒性。(iii)使用额外的传感器来检测和考虑环境噪声将被制定。