Aharonov–Bohm Effect as a Diffusion Phenomenon

This paper presents a hydrodynamical view of the Aharonov–Bohm effect, using Nelson’s formulation of quantum mechanics. Our aim is to gain a better understanding of the mysteries behind this effect, such as why in the prototype Aharonov–Bohm system with a cylinder the motion of a particle is affected in a region where there is no magnetic field. Our main purpose is to use Nelson’s formulation to describe the effect and demonstrate that it can be explained by the direct action of the current surrounding the magnetic field region. Although conventional theories try to present vector potentials as more physically significant than magnetic fields, our purpose is to demonstrate that such debate regarding the comparison between vector potentials and magnetic fields should not exist at all; within our context, magnetic fields and vector potentials serve as tools for finding other fundamental hydrodynamical quantities that arise from the interaction between the quantum background fields described by Nelson’s quantum theory, and thus, play a secondary role at the explanation of this phenomenon. So, in this paper, we do not intend to participate in a debate regarding whether we should give a local (based on e/m forces and e/m fields) or non-local (based on vector potentials) description of the phenomenon. Finally, we investigate the relationship between hidden variables and quantum fluctuations, their role in this phenomenon and their connection with the gauge transformation of the vector potential, that plays a leading role in quantum AB systems.