标题： 卡西米尔效应：光学方法之二。局部可观测量和热修正 显示英文标题

标题： Casimir Effects: an Optical Approach II. Local Observables and Thermal Corrections

摘要： 我们最近提出了一种基于经典光线光学（“光学近似”）的新方法来研究卡西米尔效应。在本文中，我们展示了如何利用这种方法来计算场论的局域可观测量。特别是，我们研究了能量-动量张量和卡西米尔压力。我们详细讨论了三个例子：平行板、卡西米尔摆和一个球体与一块板相对的情况。我们还展示了如何计算热修正，证明对于任意光滑几何形状，高温‘经典极限’确实成立。 显示英文摘要

摘要： We recently proposed a new approach to the Casimir effect based on classical ray optics (the "optical approximation"). In this paper we show how to use it to calculate the local observables of the field theory. In particular we study the energy-momentum tensor and the Casimir pressure. We work three examples in detail: parallel plates, the Casimir pendulum and a sphere opposite a plate. We also show how to calculate thermal corrections, proving that the high temperature `classical limit' is indeed valid for any smooth geometry.