Abstract
Questions concerning superselection rules are considered. Two experiments are discussed. In the first, coherent superpositions of different angular-momentum states are constructed. In the second, coherent superpositions of states with different charge are constructed in complete analogy with the angular-momentum case. We suggest that, contrary to a widespread belief, interference may be possible between states with different charges.
- Received 25 August 1966
DOI:https://doi.org/10.1103/PhysRev.155.1428
©1967 American Physical Society
