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Fast Incomplete Decoherence of Nuclear Spins in Quantum Hall Ferromagnet

T. Maniv·Yu. A. Bychkov·I. D. Vagner·P. Wyder
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Abstract

A scenario of quantum computing process based on the manipulation of a large number of nuclear spins in Quantum Hall (QH) ferromagnet is presented. It is found that vacuum quantum fluctuations in the QH ferromagnetic ground state at filling factor $ν=1$, associated with the virtual excitations of spin waves, lead to fast incomplete decoherence of the nuclear spins. A fundamental upper bound on the length of the computer memory is set by this fluctuation effect.

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T. Maniv, Yu. A. Bychkov, I. D. Vagner, P. Wyder. 2000-12-22. Fast Incomplete Decoherence of Nuclear Spins in Quantum Hall Ferromagnet. https://doi.org/10.1103/physrevb.64.193306

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