弯曲时空中量子资源的保护与利用

The project is to find the effectively measures to reduce or cancel the impact of curved spacetime on quantum source, and study, by means of quantum metrology techniques, the realization of detection of the physical quantities with high precision. We will analyze how the curved spacetime affects quantum resources with the approaches of local Gaussian field modes, quantum optics cavity modes and open quantum system. We also consider how to effectively reduce such impact or even cancel it by choosing the preparation of initial states, adjusting the boundary conditions of quantum fields, and utilizing the weak measurement, quantum steering, entanglement purification and coherence distillation. It could provide us some guidance to the protection of quantum resource and thus the guarantee of the effective realization of quantum information tasks. Furthermore, we will apply the quantum effects to the detection of the physical quantities to achieve the quite high precision which can not be obtained with the traditional classical means by using the correlation between the curved spacetime and the quantum metrology for multi-parameters. The quantum means allow us to detect some objects which are not detectable with classical means and help us solve some basic problems involving gravity. Some novel results will be expected in the crossing field of relativity, quantum theory, quantum information and quantum field theory, and the studies are benefits for us to fuse the relativity and quantum mechanics and to detect the physical quantities of gravity.

本项目致力于寻求有效措施来消除或降低时空弯曲对量子资源的影响，研究如何运用量子度量学来实现与引力相关的物理量的超高精度探测。一方面，采用局域高斯模量子化、光学腔模以及开放量子系统等方法分析时空弯曲如何影响量子资源，探讨制备何种初始态、如何调控场模的边界条件、以及如何利用量子操控、纠缠提纯和相干性蒸馏等方法来消除或降低这些影响，为量子资源的保护、保证量子信息任务的有效进行提供理论依据。另一方面，通过时空弯曲与量子态区分、量子算符区分及量子精密测量之间的关联，利用量子测度实现经典手段无法达到的超高精度测量，将其应用到检测不同引力理论、高精度探测与引力相关的物理量、以及探测经典手段无法触及的被测对象，力图解决与引力相关的重要基本问题。本项目有望在相对论、量子论、量子信息等多学科交叉领域中得到一些有意义的结果，将对相对论和量子论等多学科的交叉融合以及与引力相关物理量的探测有积极的推动作用。

本项目致力于寻求有效措施来消除或降低时空弯曲对量子资源的影响，研究如何运用量子度量学来实现与引力相关的物理量的高精度探测。通过采用局域高斯模量子化以及开放量子系统等方法分析时空弯曲如何影响量子资源，探讨制备何种初始态、调控场模的边界条件、以及如何利用量子操控、纠缠提纯等方法来消除或降低这些影响，为量子资源的保护、保证量子信息任务的有效进行提供理论依据。通过时空弯曲与量子态区分、量子算符区分及量子精密测量之间的关联，利用量子测度实现经典手段无法达到的超高精度测量，将其应用到检测不同引力理论、高精度探测与引力相关的物理量、以及探测经典手段无法触及的被测对象。项目支撑了人才培养。我们已实现了项目的研究目标。