Collective Nuclear Stabilization by Optically Excited Hole in Quantum Dot

Details Collective Nuclear Stabilization by Optically Excited Hole in Quantum Dot Collective Nuclear Stabilization by Optically Excited Hole in Quantum Dot

2010-11-30

arxiv.org/abs/1012.0060v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

We propose that an optically excited heavy hole in a quantum dot can drive the surrounding nuclear spins into a quiescent collective state, leading to significantly prolonged coherence time for the electron spin qubit. This provides a general paradigm to combat decoherence by environmental control without involving the active qubit in quantum information processing. It also serves as a unified solution to some open problems brought about by two recent experiments [X. Xu et al., Nature 459, 1105 (2009) and C. Latta et al., Nature Phys. 5, 758 (2009)].

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