标题： 经典与量子引力中的等效原理 显示英文标题

标题： Equivalence Principle in Classical and Quantum Gravity

摘要： 我们概述了经典和量子物理中各种形式的等效原理，特别强调所谓的弱等效原理，并对比其在力学与场论中的有效性。 我们还讨论了将其推广到量子引力理论的可能性。 我们的分析表明，只有强等效原理可以被视为足够根本，从而能够在量子引力背景下被推广，因为所有其他形式的等效原理在经典水平上仅近似成立。 显示英文摘要

摘要： We give a general overview of various flavors of the equivalence principle in classical and quantum physics, with special emphasis on the so-called weak equivalence principle, and contrast its validity in mechanics versus field theory. We also discuss its generalisation to a theory of quantum gravity. Our analysis suggests that only the strong equivalence principle can be considered fundamental enough to be generalised to a quantum gravity context, since all other flavors of equivalence principle hold only approximately already at the classical level.