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arXiv · 1103.4862

Semi-classical model for the dephasing of a two-electron spin qubit coupled to a coherently evolving nuclear spin bath

Izhar Neder·Mark S. Rudner·Hendrik Bluhm·Sandra Foletti·Bertrand I. Halperin·Amir Yacoby
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Abstract

We study electron spin decoherence in a two-electron double quantum dot due to the hyperfine interaction, under spin-echo conditions as studied in recent experiments. We develop a semi-classical model for the interaction between the electron and nuclear spins, in which the time-dependent Overhauser fields induced by the nuclear spins are treated as classical vector variables. Comparison of the model with experimentally-obtained echo signals allows us to quantify the contributions of various processes such as coherent Larmor precession and spin diffusion to the nuclear spin evolution.

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Izhar Neder, Mark S. Rudner, Hendrik Bluhm, Sandra Foletti, Bertrand I. Halperin, Amir Yacoby. 2011-09-05. Semi-classical model for the dephasing of a two-electron spin qubit coupled to a coherently evolving nuclear spin bath. https://doi.org/10.1103/physrevb.84.035441

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