Coherent control of nuclear-spin system in a quantum-Hall device

Machida, Tomoki; Yamazaki, Tomoyuki; Ikushima, Kenji; Komiyama, Susumu
January 2003
Applied Physics Letters;1/20/2003, Vol. 82 Issue 3, p409
Academic Journal
Coherent control of local nuclear spins in a solid-state device is demonstrated. By unequally populating spin-resolved quantum-Hall edge channels, nuclear spins in a limited region along the edge channels are strongly polarized via the hyperfine interaction. Pulsed rf magnetic fields, generated by a built-in micrometal strip, cause the nuclear-spin state to evolve coherently. The nuclear-spin state reached during the pulse duration is finally read out via the edge-channel conductance, which shows Rabi oscillation.


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