Nuclear Spin Qubit Dephasing Time in the Integer Quantum Hall Effect Regime
介观与纳米尺度物理
2010-09-22 v2 材料科学
强关联电子
量子物理
摘要
We report the first theoretical estimate of the nuclear-spin dephasing time T_2 owing to the spin interaction with the two-dimensional electron gas, when the latter is in the integer quantum Hall state, in a two-dimensional heterojunction or quantum well at low temperature and in large applied magnetic field. We establish that the leading mechanism of dephasing is due to the impurity potentials that influence the dynamics of the spin via virtual magnetic spin-exciton scattering. Implications of our results for implementation of nuclear spins as quantum bits (qubits) for quantum computing are discussed.
引用
@article{arxiv.cond-mat/0002350,
title = {Nuclear Spin Qubit Dephasing Time in the Integer Quantum Hall Effect Regime},
author = {D. Mozyrsky and V. Privman and I. D. Vagner},
journal= {arXiv preprint arXiv:cond-mat/0002350},
year = {2010}
}
备注
19 pages in plain TeX