Abstract
The double covers and of the orthonormal groups and , respectively, are not necessarily isomorphic. They are locally isomorphic but, in general, not globally so. We compute the vacuum expectation values of several quantized fermionic currents on a nonorientable spacetime () for both groups. They are strikingly different.
- Received 22 September 1989
DOI:https://doi.org/10.1103/PhysRevD.41.1901
©1990 American Physical Society