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Quantum tunnelling and decoherence in nanomagnets

✍ Scribed by Z. Gedik; Ö. Bozat

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
287 KB
Volume
3
Category
Article
ISSN
1862-6351

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✦ Synopsis

Abstract

Starting from the observation that at very low temperatures an isolated nanomagnet can be treated as an effective two‐state system, we introduce a model to study quantum tunnelling and decoherence phenomena. We assume that the total spin of the magnet interacts with a spin bath. We show that depending upon the interaction strengths the molecule can exhibit tunnelling with or without decoherence. We also investigate the case where the spin‐spin interaction is mediated by phonons. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Dissipation and decoherence in quantum m
Dissipation and decoherence in quantum magnetic systems
✍ P.C.E. Stamp 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 721 KB

Dissipation and decoherence are reviewed for quantum magnets, in which quantum fluctuations render a semi-classical picture incorrect. This is done for 3 examples in detail. First, the tunneling of magnetic domain walls is considered-this is a typical quantum soliton problem, with dissipation being