近日，英国伦敦大学Howl, Richard团队揭示了经典的引力理论产生了纠缠。2025年10月22日，《自然》杂志发表该研究成果。

引力和量子力学的统一仍然是科学中最深刻的开放性问题之一。随着量子技术的最新进展，理查德·费曼率先提出的一个实验构想现在被认为是首次检验这种统一理论的可行途径。

该实验包括将一个大质量物体置于两个位置的量子叠加态中，并让其与另一个质量体发生相互作用。如果两个物体随后发生量子纠缠，则被认为是引力遵循量子力学定律的决定性证据。这一结论来源于一些将经典引力相互作用视为只能传输经典信息而非量子信息的局部相互作用的定理。

研究组将这些定理中使用的物质描述符扩展到量子场论的完整框架，发现经典引力理论可以传输量子信息，从而通过物理定域过程产生量子纠缠。该效应的标度律与量子引力理论所预测的不同，因此它提供了可强有力证明引力量子性质的实验参数和形式信息。

附：英文原文

Title: Classical theories of gravity produce entanglement

Author: Aziz, Joseph, Howl, Richard

Issue&Volume: 2025-10-22

Abstract: The unification of gravity and quantum mechanics remains one of the most profound open questions in science. With recent advances in quantum technology, an experimental idea first proposed by Richard Feynman1 is now regarded as a promising route to testing this unification for the first time. The experiment involves placing a massive object in a quantum superposition of two locations and letting it gravitationally interact with another mass. If the two objects subsequently become entangled, this is considered unambiguous evidence that gravity obeys the laws of quantum mechanics. This conclusion derives from theorems that treat a classical gravitational interaction as a local interaction capable of transmitting only classical, not quantum, information2,3,4,5,6,7,8. Here we extend the description of matter used in these theorems to the full framework of quantum field theory, finding that theories with classical gravity can then transmit quantum information and, thus, generate entanglement through physical, local processes. The effect scales differently to that predicted by theories of quantum gravity, and so it gives information on the parameters and form of the experiment required to robustly provide evidence for the quantum nature of gravity.

DOI: 10.1038/s41586-025-09595-7

Source: https://www.nature.com/articles/s41586-025-09595-7