Answers are grounded in this paper and cite their sources.
Certain spin Hamiltonians that give rise to tunnel splittings that are viewed in terms of interfering instanton trajectories are restudied using a discrete WKB method, that is more elementary, and also yields wave functions and preexponential factors for the splittings. A novel turning point inside the classically forbidden region is analyzed, and a general formula is obtained for the splittings. The result is applied to the Fe₈ system. A previous result for the oscillation of the ground state splitting with external magnetic field is extended to higher levels.
No takes yet. Share an insight, caveat, or question.
Anupam Garg (1999) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: