1206.5362 (R. Y. Chiao)

Novel Aharonov-Bohm-like effect: Detectability of the vector potential
in a solenoidal configuration with a ferromagnetic core covered by
superconducting lead, and surrounded by a thin cylindrical shell of aluminum    [PDF]

R. Y. Chiao

The flux as measured by the Josephson effect in a SQUID-like configuration with a ferromagnetic core inserted into its center, is shown to be sensitive to the vector potential arising from the central ferromagnetic core, even when the core is covered with a superconducting material that prevents any magnetic field lines from ever reaching the perimeter of the SQUID-like configuration. This leads to a macroscopic, Aharonov-Bohm-like effect that is observable in an asymmetric hysteresis loop in the response of the SQUID-like configuration to an externally applied magnetic field.

View original: http://arxiv.org/abs/1206.5362