Multipulse Operation and Optical Detection of Nuclear Spin Coherence in a GaAs/AlGaAs Quantum Well
Multipulse Operation and Optical Detection of Nuclear Spin Coherence in a GaAs/AlGaAs Quantum Well
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DOI：
10.1103/physrevlett.101.207601
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发表时间：
2008-11-14
影响因子：
8.6
通讯作者：
Ohno, H.
中科院分区：
文献类型：
--
作者：
Kondo, Y.;Ono, M.;Ohno, H.
我们演示了在GaAs/AlGaAs量子阱中的核自旋相干性的操作，通过光学检测的核磁共振（NMR）。探测光激发电子自旋的拉莫尔旋进相移，读出超精细耦合核自旋极化。用多脉冲核磁共振序列控制自旋3/2As-75四极分裂核的布居数并研究其相位相干性。通过应用量子门操作中使用的脉冲序列，解决了多级核自旋态之间的相位相干性。
We demonstrate manipulation of nuclear spin coherence in a GaAs/AlGaAs quantum well by optically detected nuclear magnetic resonance (NMR). A phase shift of the Larmor precession of photoexcited electron spins is detected to read out the hyperfine-coupled nuclear spin polarization. Multipulse NMR sequences are generated to control the population and examine the phase coherence in quadrupolar-split spin-3/2 As-75 nuclei. The phase coherence among the multilevel nuclear spin states is addressed by application of pulse sequences that are used in quantum gate operations.