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Numerical modeling of the central spin problem using the spin-coherent-state representation.

作者信息

Al-Hassanieh K A, Dobrovitski V V, Dagotto E, Harmon B N

机构信息

Condensed Matter Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37996, USA.

出版信息

Phys Rev Lett. 2006 Jul 21;97(3):037204. doi: 10.1103/PhysRevLett.97.037204. Epub 2006 Jul 20.

DOI:10.1103/PhysRevLett.97.037204
PMID:16907541
Abstract

In this work, we consider decoherence of a central spin by a spin bath. In order to study the nonperturbative decoherence regimes, we develop an efficient mean-field-based method for modeling the spin-bath decoherence, based on the representation of the central spin density matrix. The method can be applied to longitudinal and transverse relaxation at different external fields. In particular, by modeling large-size quantum systems (up to 16 000 bath spins), we make controlled predictions for the slow long-time decoherence of the central spin.

摘要

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