Periodic Instantons and Quantum-Classical Transitions in Spin Systems

  • The tunneling splitting of the energy levels of a ferromagnetic particle in the presence of an applied magnetic field - previously derived only for the ground state with the path integral method - is obtained in a simple way from Schr"odinger theory. The origin of the factors entering the result is clearly understood, in particular the effect of the asymmetry of the barriers of the potential. The method should appeal particularly to experimentalists searching for evidence of macroscopic spin tunneling.

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Metadaten
Author:Jiu-Qing Liang, H. J. W. Müller-Kirsten, F. Zimmerschied, D.K. Park
URN (permanent link):urn:nbn:de:hbz:386-kluedo-8640
Document Type:Preprint
Language of publication:English
Year of Completion:1998
Year of Publication:1998
Publishing Institute:Technische Universität Kaiserslautern
Faculties / Organisational entities:Fachbereich Physik
DDC-Cassification:530 Physik

$Rev: 12793 $