Nuclear spin coherence in a quantum wire.
PHYS REV B
, Article 115326. 10.1103/PhysRevB.80.115326.
We have observed millisecond-long coherent evolution of nuclear spins in a quantum wire at 1.2 K. Local, all-electrical manipulation of nuclear spins is achieved by dynamic nuclear polarization in the breakdown regime of the integer quantum Hall effect combined with pulsed nuclear magnetic resonance. The excitation thresholds for the breakdown are significantly smaller than what would be expected for our sample and the direction of the nuclear polarization can be controlled by the voltage bias. As a four-level spin system, the device is equivalent to two qubits.
|Title:||Nuclear spin coherence in a quantum wire|
|Keywords:||MAGNETIC-RESONANCE, ELECTRON-GAS, POLARIZATION, DEVICE, STATES, WELLS, EDGE, GAAS|
|UCL classification:||UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Engineering Science
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