Effect of Aharonov-Bohm Phase on Spin Tunneling
ChangSoo Park, D. K. Park
Abstract
The role of Aharonov-Bohm effect in quantum tunneling is examined when a potential is defined on the S1 and has N-fold symmetry. We show that the low-lying energy levels split from the N-fold degenerate ground state oscillate as a function of the Aharonov-Bohm phase, from which general degeneracy conditions depending on the magnetic flux is obtained. We apply these results to the spin tunneling in a spin system with N-fold rotational symmetry around a hard axis.
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