Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-02-05
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.
Hirayama Yoshiharu
Kumada Norio
Miyashita Satoshi
Ota Toshihiko
Yusa G.
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