Mechanisms of decoherence in weakly anisotropic molecular magnets

Details Mechanisms of decoherence in weakly anisotropic molecular magnets Mechanisms of decoherence in weakly anisotropic molecular magnets

1999-06-24

arxiv.org/abs/cond-mat/9906375v2

Phys. Rev. Lett. 84, 3458 (2000)

Physics

Condensed Matter

Materials Science

4 pages RevTeX, 1 figure (PostScript)

Scientific paper

10.1103/PhysRevLett.84.3458

Decoherence mechanisms in crystals of weakly anisotropic magnetic molecules, such as V15, are studied. We show that an important decohering factor is the rapid thermal fluctuation of dipolar interactions between magnetic molecules. A model is proposed to describe the influence of this source of decoherence. Based on the exact solution of this model, we show that at relatively high temperatures, about 0.5 K, the quantum coherence in a V15 molecule is not suppressed, and, in principle, can be detected experimentally. Therefore, these molecules may be suitable prototype systems for study of physical processes taking place in quantum computers.

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