随时间变化的磁场对电子自旋的量子控制
收稿日期: 2018-01-25
录用日期: 2018-05-30
网络出版日期: 2019-01-09
基金资助
忻州师范学院2017 院级教学改革创新项目( JG201730) 及山西省教育科学" 十三五" 规划2017 年度项目( GH-17061) 资助
Quantum control of time-dependent magnetic field on the electron spin
Received date: 2018-01-25
Accepted date: 2018-05-30
Online published: 2019-01-09
罗国忠 . 随时间变化的磁场对电子自旋的量子控制[J]. 大学物理, 2018 , 37(12) : 1 . DOI: 10.16854 /j.cnki.1000-0712.180071
The quantum control of the time varying magnetic field on the electron spin is studied by means of
the method for the quantum control of the electron spin in a constant magnetic field，namely，the time varying magnetic
field is converted to a rotating magnetic field and a constant magnetic field. Using the precession frequency of
the rotating magnetic field and the adjustment of magnitude and action time of the magnetic field，it can make the
spin direction of the particle cause periodic change occurred between the +z and -z directions and adjust the size of
amplitude of the static magnetic field and the time of action to control the spin of the electron. This achieves the
control of the direction of electron spin.
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