Fast incomplete, decoherence of nuclear spins in a quantum Hall ferromagnet

被引：11

作者：

Maniv, T ^{[5
]}

Bychkov, YA

Vagner, ID

Wyder, P

机构：

[1] Technion Israel Inst Technol, Dept Chem, IL-32000 Haifa, Israel

[2] CNRS, Grenoble, France

[3] LD Landau Theoret Phys Inst, Moscow, Russia

[4] Holon Inst Technol, Dept Commun Engn, IL-58102 Holon, Israel

[5] Max Planck Inst Festkorperforsch, Grenoble High Magnet Field Lab, F-38042 Grenoble, France

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.64.193306

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A scenario of the quantum computing process based on the manipulation of a large number of nuclear spins in quantum Hall (QH) ferromagnets 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 constraint on the level of decoherence is set by this fluctuation effect. For GaAs multiple-quantum-well structures we find a coherence level not smaller than 1-10(-9), which is safely above the danger level of quantum error correction methods.

引用

页数：4

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