Frequency shifts and relaxation rates for spin-1/2 particles moving in electromagnetic fields
Frequency shifts and relaxation rates for spin-1/2 particles moving in electromagnetic fields
复制标题
自旋 1/2 粒子在电磁场中运动的频移和弛豫率
DOI：
10.1103/physreva.92.053407
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发表时间：
2015
影响因子：
2.9
通讯作者：
Robert Golub
中科院分区：
文献类型：
--
作者：
Guillaume Pignol;M. Guigue;A. Petukhov;Robert Golub
我们讨论了绝热和非绝热状态下自旋 1/2 粒子集合上的非均匀电磁场导致的拉莫尔频移和纵向弛豫率的行为。我们还展示了各种频移之间以及频移与弛豫率之间的一些一般关系。我们所有结果的显着特征是，它们是在没有对场相关函数的显式形式进行任何具体假设的情况下获得的。因此，我们期望我们的结果对于扩散和弹道运动状态以及任意细胞形状和表面散射都有效。这些结果可以应用于各种实际系统。
We discuss the behaviour of the Larmor frequency shift and the longitudinal relaxation rate due to non-uniform electromagnetic fields on an assembly of spin 1/2 particles, in adiabatic and nonadiabatic regimes. We also show some general relations between the various frequency shifts and between the frequency shifts and relaxation rates. The remarkable feature of all our results is that they were obtained without any specific assumptions on the explicit form of the correlation functions of the fields. Hence, we expect that our results are valid both for diffusive and ballistic regime of motion and arbitrary cell shapes and surface scattering. These results can then be applied to a wide variety of realistic systems.