Roles of Local Classical Acceleration and Spatial Separation in the Neutral Particle Analogs of the Aharonov-Bohm Phases

I show that neither local nonuniform classical acceleration nor spatial separation of the quantized spin components plays an essential role in a number of neutron interferometer experiments designed to detect phases ${\phi }_{\pm }\mathrm{}(B,E)\mathrm{}$ akin to the Aharonov-Bohm phases. These neutral particle phases, which simply manifest quantum interference in spin space, can also be detected by single beams, as exemplified by a recent breakthrough experiment by Sangster et al.