Fast Incomplete Decoherence of Nuclear Spins in Quantum Hall Ferromagnet

Details Fast Incomplete Decoherence of Nuclear Spins in Quantum Hall Ferromagnet Fast Incomplete Decoherence of Nuclear Spins in Quantum Hall Ferromagnet

2000-11-21

arxiv.org/abs/cond-mat/0011361v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.64.193306

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 $\nu =1$, 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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