Faraday rotation with a single-nuclear-spin qubit in a high-finesse optical cavity
Faraday rotation with a single-nuclear-spin qubit in a high-finesse optical cavity
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高精细光学腔中单核自旋量子位的法拉第旋转
DOI：
10.1103/physreva.81.042331
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发表时间：
2009
影响因子：
2.9
通讯作者：
M. Kozuma
中科院分区：
文献类型：
--
作者：
N. Takei;M. Takeuchi;Y. Eto;A. Noguchi;Peng Zhang;Masahito Ueda;M. Kozuma
当非共振光场与原子自旋耦合时，其偏振态可以通过法拉第旋转而根据自旋的方向旋转，该旋转已被用于监测和控制原子自旋。在高精细度光腔中，我们观察到了自旋为{sup 171}Yb原子1/2核的法拉第旋转角大于10度。通过利用单个核自旋与光子之间的耦合，我们还证明了自旋可以通过透射的单个辅助光子的投影来投影或弱测量。
When an off-resonant light field is coupled with atomic spins, its polarization can rotate depending on the direction of the spins via Faraday rotation, which has been used for monitoring and controlling the atomic spins. We observed Faraday rotation by an angle of more than 10 deg for a single nuclear spin of 1/2 of a {sup 171}Yb atom in a high-finesse optical cavity. By employing the coupling between the single nuclear spin and a photon, we have also demonstrated that the spin can be projected or weakly measured through the projection of the transmitted single ancillary photon.