Spin Coherent-State Path Integrals and the Instanton Calculus

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dc.creatorGarg, Anupam
dc.creatorKochetov, Evgueny
dc.creatorPark, Kee-Su
dc.creatorStone, Michael
dc.date2001-11-08
dc.date.accessioned2026-07-07T02:43:25Z
dc.date.available2026-07-07T02:43:25Z
dc.descriptionWe 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 provided the fluctuation determinant is carefully evaluated, the path integral expression is accurate to order O(1/j). We apply the method to the LMG model and to the molecular magnet Fe_8 in a transverse field.
dc.description32 Pages, RevTex. No figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0111139
dc.identifierhttp://arxiv.org/abs/cond-mat/0111139
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18493
dc.subjectCondensed Matter
dc.subjectQuantum Physics
dc.titleSpin Coherent-State Path Integrals and the Instanton Calculus
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