Fast Incomplete Decoherence of Nuclear Spins in Quantum Hall Ferromagnet
arXiv:cond-mat/0011361 · doi:10.1103/PhysRevB.64.193306
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.