Coherent control of nuclear-spin system in quantum-hall devices

摘要

We demonstrate coherent control of local nuclear spins in a solid-state device. Nuclear spins in a limited region along spin-resolved quantum-Hall edge channels are strongly polarized through the hyperfine interaction. Quantum states of the nuclear spins evolve coherently during a pulsed-mode application of rf magnetic field generated by a built-in micro-metal strip. The final state reached after the pulsed-mode operation is read out by the edge-channel conductance, which shows Rabi oscillation.