Majid Shahn
School of Mathematical Sciences, Queen Mary University of London, London, UK.
Philos Trans A Math Phys Eng Sci. 2025 May 8;383(2296):20230377. doi: 10.1098/rsta.2023.0377.
The turn of the millennium was a time of optimism about an approach to non-commutative geometry inspired by rich mathematical objects called 'quantum groups' and its applications to quantum spacetime. The idea was to model quantum gravity effects as non-commutativity of spacetime coordinates and arguably solve quantum gravity itself. This required, however, a 20-year development of a suitable formalism of (QRG) to handle such coordinates, which I outline here. I then provide new results for state-of-the-art fuzzy sphere and [Formula: see text]-gon 'baby quantum gravity' models in this approach and some possible features of quantum gravity that these models suggest. Also discussed are the critical conceptual and mathematical elements that are still missing to more fully achieve this goal.This article is part of the theme issue 'Science into the next millennium: 25 years on'.
千年之交时,人们对一种受称为“量子群”的丰富数学对象启发的非交换几何方法及其在量子时空的应用充满乐观。其理念是将量子引力效应建模为时空坐标的非对易性,并有望解决量子引力本身。然而,这需要20年时间来发展一种合适的(量子黎曼几何,QRG)形式体系来处理此类坐标,我将在此概述。然后,我给出了这种方法中最先进的模糊球面和n边形“婴儿量子引力”模型的新结果,以及这些模型所暗示的量子引力的一些可能特征。还讨论了要更全面地实现这一目标仍缺失的关键概念和数学元素。本文是主题为“科学进入下一个千年:25年之后”的一部分。