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Communication: An exact short-time solver for the time-dependent Schrödinger equation

机译:交流:一个精确的短时求解器用于求解与时间有关的薛定ding方程

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摘要

The short-time integrator for propagating the time-dependent Schrödinger equation, which is exact to machine’s round off accuracy when the Hamiltonian of the system is time-independent, was applied to solve dynamics processes. This integrator has the old Cayley’s form [i.e., the Padé (1,1) approximation], but is implemented in a spectrally transformed Hamiltonian which was first introduced by Chen and Guo. Two examples are presented for illustration, including calculations of the collision energy-dependent probability passing over a barrier, and interaction process between pulse laser and the I2 diatomic molecule.
机译:传播时间相关的Schrödinger方程的短时积分器被用于求解动力学过程,该积分与系统的哈密顿量不依赖时间时的机器舍入精度完全相同。该积分器具有旧的Cayley格式[即Padé(1,1)近似],但在由Chen和Guo首次引入的经光谱变换的哈密顿量中实现。给出了两个示例进行说明,包括计算通过障碍的碰撞能量相关概率以及脉冲激光与I2双原子分子之间的相互作用过程。

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