A Time-Dependent Approach to High-Resolution Photoabsorption Spectrum of Rydberg Atoms in Magnetic Fields
A Time-Dependent Approach to High-Resolution Photoabsorption Spectrum of Rydberg Atoms in Magnetic Fields
复制标题
磁场中里德伯原子高分辨率光吸收光谱的时变方法
DOI：
10.1088/0256-307x/25/6/023
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Shi Ting
中科院分区：
文献类型：
--
作者：
B. Xuebin;Liu Hong;Shi Ting
本文提出了一种计算磁场中里德伯原子高分辨光吸收谱的强含时方法。传统上，我们必须数值对角化一个巨大的矩阵，以解决特征值问题，然后获得频谱信息。这种矩阵运算需要具有大容量存储器的高速计算机。另外，我们提出了一个单一的，但很容易并行化的时间演化方法，以廉价的方式，这是非常准确和稳定的，即使在长时间尺度的演变。用这种方法计算了磁场中氢原子的光谱，与实验结果符合得很好。它可以扩展到更复杂的情况下，如在电场和磁场的组合研究里德堡原子的动力学。
A robust time-dependent approach to the high-resolution photoabsorption spectrum of Rydberg atoms in magnetic fields is presented. Traditionally we have to numerically diagonalize a huge matrix to solve the eigen-problem and then to obtain the spectral information. This matrix operation requires high-speed computers with large memories. Alternatively we present a unitary but very easily parallelized time-evolution method in an inexpensive way, which is very accurate and stable even in long-time scale evolution. With this method, we perform the spectral calculation of hydrogen atom in magnetic field, which agrees well with the experimental observation. It can be extended to study the dynamics of Rydberg atoms in more complicated cases such as in combined electric and magnetic fields.