On the feasibility of detecting an Aharonov-Bohm phase shift in neutral matter
نویسندگان
چکیده
It has been predicted that, in the presence of combined radial electric field and axial magnetic field, superfluid He in a torus will have a persistent current in its ground state. This surprising result arises from non-cancellation of the Aharonov-Bohm phase shifts associated with the opposite charges in the induced electric dipole moment of the neutral He atoms. We briefly review this prediction and describe our proposed experiment. In this feasibility study we show that by applying laboratory accessible electric and magnetic fields, a superfluid He interferometer (SHeQUID) will have sufficient sensitivity to conclusively determine whether or not the predicted physical phenomenon exists.
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