Abstract
Recently, Berry recognized that topological phase factors may arise when a quantum mechanical system is adiabatically transported around a closed circuit. We have measured Berry’s topological phases by polarized-neutron spin rotation in a helical magnetic field. Berry’s law is thus verified for fermions.
- Received 13 March 1987
DOI:https://doi.org/10.1103/PhysRevLett.59.251
©1987 American Physical Society
