Vacuum energies on spheres and in cubes
arXiv:1106.3657
Abstract
The vacuum energy of a conformally coupled scalar field on the d-dimensional sphere is calculated. On even spheres it is zero and on odd spheres it oscillates in sign. Results for the d-torus and d-cube are also given.
A reissue of a 1983 report, SPIRES PRINT-83-1086. 9 pages