Nuclear spin population and its control toward initialization using an all-electrical sub-micron scale nuclear magnetic resonance device

Details Nuclear spin population and its control toward initialization using an all-electrical sub-micron scale nuclear magnetic resonance device Nuclear spin population and its control toward initialization using an all-electrical sub-micron scale nuclear magnetic resonance device

2007-02-05

arxiv.org/abs/cond-mat/0702086v1

Appl. Phys. Lett. 90, 102118 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 3 figures, Accepted for publication in App. Phys. Lett

Scientific paper

We study the nuclear spin population in a GaAs quantum well structure and demonstrate its initialization using an all-electrical nuclear magnetic resonance (NMR) device. In our device, nuclear spins are dynamically polarized in a sub-micron scale region defined by split gates. The nuclear spin populations under various polarization conditions are estimated from resistively-detected pulsed NMR spectra. We find that nuclear spin populations are determined by electron spin configurations. By applying radio frequency pulses to the strongly polarized nuclear spins, we demonstrate the creation of two-qubit effective pure states, which is a crucial step toward NMR quantum computation.

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