Quantum tunnelling and decoherence in nanomagnets
Gedik, Zafer and Bozat, Özgür (2006) Quantum tunnelling and decoherence in nanomagnets. Physica Status Solidi.C - Current Topics in Solid State Physics, 3 (5). pp. 1268-1270. ISSN 1610-1634
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.
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