Quantum Tunneling and Phase Transitions in Spin Systems with an Applied Magnetic Field

  • Transitions from classical to quantum behaviour in a spin system with two degenerate ground states separated by twin energy barriers which are asymmetric due to an applied magnetic field are investigated. It is shown that these transitions can be interpreted as first- or second-order phase transitions depending on the anisotropy and magnetic parameters defining the system in an effective Lagrangian description.

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Metadaten
Author:S.-Y. Lee, H. J. W. Müller-Kirsten, F. Zimmerschied, D.K. Park
URN (permanent link):urn:nbn:de:hbz:386-kluedo-8650
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

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