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cond-mat.mes-hall2001★ 27 cited
SU(2) instantons with boundary jumps and spin tunneling in magnetic molecules
Ersin Kececioglu, Anupam Garg
Coherent state path integrals are shown in general to contain instantons with jumps at the boundaries, i.e., with boundary points lying outside classical parameter or phase space.…
cond-mat2001
Spin Coherent-State Path Integrals and the Instanton Calculus
Anupam Garg, Evgueny Kochetov, Kee-Su Park +1
We use an instanton approximation to the continuous-time spin coherent-state path integral to obtain the tunnel splitting of classically degenerate ground states. We show that prov…