标题： 量子引力的探索 显示英文标题

标题： The Quest for Quantum Gravity

摘要： 理论物理面临的最大挑战之一在于调和爱因斯坦的经典引力理论——广义相对论——与量子场论。尽管这两个理论在其各自的适用范围内都得到了实验支持，但它们似乎彼此不兼容。本文概述了超弦方法在解决该问题上的现状、Ashtekar纲领的状态，并讨论了量子引力中的时间问题。文中还包括了对Abhay Ashtekar、Chris Isham和Edward Witten的访谈。 显示英文摘要

摘要： One of the greatest challenges facing theoretical physics lies in reconciling Einstein's classical theory of gravity - general relativity - with quantum field theory. Although both theories have been experimentally supported in their respective regimes, they seem mutually incompatible. This article summarises the current status of the superstring approach to the problem, the status of the Ashtekar program, and addresses the problem of time in quantum gravity. It contains interviews with Abhay Ashtekar, Chris Isham, and Edward Witten.