Dynamical nuclear spin polarization and the Zamboni effect in gated double quantum dots

Details Dynamical nuclear spin polarization and the Zamboni effect in gated double quantum dots Dynamical nuclear spin polarization and the Zamboni effect in gated double quantum dots

2006-10-21

arxiv.org/abs/cond-mat/0610585v2

Phys. Rev. B 75, 161301(R) (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

A dynamical nuclear polarization scheme is studied in gated double dots. We demonstrate that a small polarization ($\sim 0.5%$) is sufficient to enhance the singlet decay time by two orders of magnitude. This enhancement is attributed to an equilibration process between the nuclear reservoirs in the two dots accompanied by reduced fluctuations in the Overhauser fields, that are mediated by the electron-nuclear spin hyperfine interaction.

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