Decoherence of localized spins interacting via RKKY interaction

Details Decoherence of localized spins interacting via RKKY interaction Decoherence of localized spins interacting via RKKY interaction

2004-08-17

arxiv.org/abs/cond-mat/0408375v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4pages, 2figures

Scientific paper

10.1103/PhysRevB.72.033308

We theoretically study decoherence of two localized spins interacting via the RKKY interaction in one-, two-, and three-dimensional electron gas. We derive the kinetic equation for the reduced density matrix of the localized spins and show that energy relaxation caused by singlet-triplet transition is suppressed when the RKKY interaction is ferromagnetic. We also estimate the decoherence time of the system consisting of two quantum dots embedded in a two dimensional electron gas.

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