Effect of Aharonov-Bohm Phase on Spin Tunneling
نویسندگان
چکیده
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. 03.65.Bz, 03.65.Sq, 75.45.+j, 75.10Dg.
منابع مشابه
Effect of Aharonov-Bohm Phase in Semiclassical Quantum Tunneling
The role of Aharonov-Bohm effect in quantum tunneling is examined when potential is defined on S1 and has N -fold symmetry. For N = 2 case the quenched tunneling splitting occurs at cos Φ/2 = 0 where Φ is magnetic flux. For N = 3 and N = 4 cases the ground state energies splitted from threeand four-fold degenerate vacua by quantum tunneling are explicitly computed. The N = 4 case is applied to ...
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