Multiple-quantum transitions and charge-induced decoherence of donor nuclear spins in silicon

2016/10/13 by David P. Franke, Moritz P. D. Pflüger, Kohei M. Itoh +1 · 1 citation
Physics and Astronomy · #quant-ph #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevlett.118.246401

published as Phys. Rev. Lett. 118, 246401 (2017) · 5 pages, 4 figures

arxiv created 2016/10/13 · arxiv updated 2017/06/21

Abstract

We study single- and multi-quantum transitions of the nuclear spins of ionized arsenic donors in silicon and find quadrupolar effects on the coherence times, which we link to fluctuating electrical field gradients present after the application of light and bias voltage pulses. To determine the coherence times of superpositions of all orders in the 4-dimensional Hilbert space, we use a phase-cycling technique and find that, when electrical effects were allowed to decay, these times scale as expected for a field-like decoherence mechanism such as the interaction with surrounding ²⁹Si nuclear spins.

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